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\n  \n 1999\n \n \n (4)\n \n \n
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\n \n\n \n \n Bergen, J.; and Wilson, M. C.\n\n\n \n \n \n \n \n X-inner automorphisms of semi-commutative quantum algebras.\n \n \n \n \n\n\n \n\n\n\n Journal of Algebra, 220(1): 152-173. 1999.\n \n\n\n\n
\n\n\n\n \n \n \"X-inner paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{bergen1999x,\n  title={X-inner automorphisms of semi-commutative quantum algebras},\n  author={Bergen, Jeffrey and Wilson, Mark C.},\n  journal={Journal of Algebra},\n  volume={220},\n  number={1},\n  pages={152-173},\n  year={1999},\n  publisher={Academic Press},\n  keywords={algebra},\n  url_Paper={https://www.sciencedirect.com/science/article/pii/S0021869399979279},\n  abstract={Many important quantum algebras such as quantum symplectic space,\nquantum euclidean space, quantum matrices, $q$-analogs of the Heisenberg\nalgebra and the quantum Weyl algebra are semi-commutative. In addition,\nenveloping algebras $U(L_+)$ of even Lie color algebras are also\nsemi-commutative. In this paper, we generalize work of Montgomery and\nexamine the X-inner automorphisms of such algebras. The theorems and\nexamples in our paper show that for algebras $R$ of this type, the\nnon-identity X-inner automorphisms of  $R$ tend to have infinite order.\nThus if $G$ is a finite group of automorphisms of $R$, then the action\nof $G$ will be X-outer and this immediately gives useful information\nabout crossed products  $R∗_t G$.}\n}\n\n
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\n Many important quantum algebras such as quantum symplectic space, quantum euclidean space, quantum matrices, $q$-analogs of the Heisenberg algebra and the quantum Weyl algebra are semi-commutative. In addition, enveloping algebras $U(L_+)$ of even Lie color algebras are also semi-commutative. In this paper, we generalize work of Montgomery and examine the X-inner automorphisms of such algebras. The theorems and examples in our paper show that for algebras $R$ of this type, the non-identity X-inner automorphisms of $R$ tend to have infinite order. Thus if $G$ is a finite group of automorphisms of $R$, then the action of $G$ will be X-outer and this immediately gives useful information about crossed products $R∗_t G$.\n
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\n \n\n \n \n Riley, D.; and Wilson, M. C.\n\n\n \n \n \n \n \n Associative algebras satisfying a semigroup identity.\n \n \n \n \n\n\n \n\n\n\n Glasgow Mathematical Journal, 41(3): 453-462. 1999.\n \n\n\n\n
\n\n\n\n \n \n \"Associative paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{riley1999associative,\n  title={Associative algebras satisfying a semigroup identity},\n  author={Riley, D.M. and Wilson, Mark C.},\n  journal={Glasgow Mathematical Journal},\n  volume={41},\n  number={3},\n  pages={453-462},\n  year={1999},\n  publisher={Cambridge University Press},\n  keywords={algebra},\n  url_Paper={https://www.cambridge.org/core/journals/glasgow-mathematical-journal/article/associative-algebras-satisfying-a-semigroup-identity/89A9FE38678C0635AE59E0B3286291CA},\n  abstract={Denote by $(R,\\cdot)$ the multiplicative semigroup of an associative\nalgebra $R$ over an infinite field, and let $(R,\\circ)$ represent $R$\nwhen viewed as a semigroup via the circle operation $x\\circ y=x+y+xy$.\nIn this paper we characterize the existence of an identity in these\nsemigroups in terms of the Lie structure of $R$. Namely, we prove that\nthe following conditions on $R$ are equivalent: the semigroup\n$(R,\\circ)$ satisfies an identity; the semigroup $(R,\\cdot)$ satisfies a\nreduced identity; and, the associated Lie algebra of $R$ satisfies the\nEngel condition. When $R$ is finitely generated these conditions are\neach equivalent to $R$ being upper Lie nilpotent.}\n}\n\n
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\n Denote by $(R,·)$ the multiplicative semigroup of an associative algebra $R$ over an infinite field, and let $(R,∘)$ represent $R$ when viewed as a semigroup via the circle operation $x∘ y=x+y+xy$. In this paper we characterize the existence of an identity in these semigroups in terms of the Lie structure of $R$. Namely, we prove that the following conditions on $R$ are equivalent: the semigroup $(R,∘)$ satisfies an identity; the semigroup $(R,·)$ satisfies a reduced identity; and, the associated Lie algebra of $R$ satisfies the Engel condition. When $R$ is finitely generated these conditions are each equivalent to $R$ being upper Lie nilpotent.\n
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\n \n\n \n \n Riley, D.; and Wilson, M. C.\n\n\n \n \n \n \n \n Group algebras and enveloping algebras with nonmatrix and semigroup identities.\n \n \n \n \n\n\n \n\n\n\n Communications in Algebra, 27(7): 3545-3556. 1999.\n \n\n\n\n
\n\n\n\n \n \n \"Group paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{riley1999group,\n  title={Group algebras and enveloping algebras with nonmatrix and semigroup identities},\n  author={Riley, D.M. and Wilson, Mark C.},\n  journal={Communications in Algebra},\n  volume={27},\n  number={7},\n  pages={3545-3556},\n  year={1999},\n  publisher={Taylor \\& Francis},\n  keywords={algebra},\n  url_Paper={https://www.tandfonline.com/doi/abs/10.1080/00927879908826645},\n  abstract={Let $K$ be a field of characteristic $p>0$.  Denote by $\\omega(R)$ the\naugmentation ideal of either a group algebra $R=K[G]$ or a restricted\nenveloping algebra $R=u(L)$ over $K$.   We first characterize those $R$\nfor which $\\omega(R)$ satisfies a polynomial identity not satisfied by\nthe algebra of all $2\\times 2$ matrices over $K$. Then, we examine those\n$R$ for which $\\omega(R)$ satisfies a semigroup identity (that is, a\npolynomial identity which can be written as the difference of two\nmonomials).}\n}\n\n
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\n Let $K$ be a field of characteristic $p>0$. Denote by $ω(R)$ the augmentation ideal of either a group algebra $R=K[G]$ or a restricted enveloping algebra $R=u(L)$ over $K$. We first characterize those $R$ for which $ω(R)$ satisfies a polynomial identity not satisfied by the algebra of all $2× 2$ matrices over $K$. Then, we examine those $R$ for which $ω(R)$ satisfies a semigroup identity (that is, a polynomial identity which can be written as the difference of two monomials).\n
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\n \n\n \n \n Riley, D.; and Wilson, M. C.\n\n\n \n \n \n \n \n Associative rings satisfying the Engel condition.\n \n \n \n \n\n\n \n\n\n\n Proceedings of the American Mathematical Society, 127(4): 973-976. 1999.\n \n\n\n\n
\n\n\n\n \n \n \"Associative paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
\n
@article{riley1999associative,\n  title={Associative rings satisfying the Engel condition},\n  author={Riley, D.M. and Wilson, Mark C.},\n  journal={Proceedings of the American Mathematical Society},\n  volume={127},\n  number={4},\n  pages={973-976},\n  year={1999},\n  keywords={algebra},\n  url_Paper={https://www.ams.org/journals/proc/1999-127-04/S0002-9939-99-04643-2/S0002-9939-99-04643-2.pdf},\n  abstract={Let $C$ be a commutative ring, and let $R$ be an associative $C$-algebra\ngenerated by elements $\\{x_1,\\ldots,x_d\\}$. We show that if $R$\nsatisfies the Engel condition of degree $n$ then $R$ is upper Lie\nnilpotent of class bounded by a function that depends only on $d$ and\n$n$. We deduce that the Engel condition in an arbitrary associative ring\nis inherited by its group of units, and implies a semigroup identity.}\n}\n\n
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\n\n\n
\n Let $C$ be a commutative ring, and let $R$ be an associative $C$-algebra generated by elements $\\{x_1,…,x_d\\}$. We show that if $R$ satisfies the Engel condition of degree $n$ then $R$ is upper Lie nilpotent of class bounded by a function that depends only on $d$ and $n$. We deduce that the Engel condition in an arbitrary associative ring is inherited by its group of units, and implies a semigroup identity.\n
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\n  \n 1998\n \n \n (3)\n \n \n
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\n \n\n \n \n Wilson, M. C.\n\n\n \n \n \n \n \n Primitive ideals in Hopf algebra extensions.\n \n \n \n \n\n\n \n\n\n\n arXiv preprint math/9808122. 1998.\n \n\n\n\n
\n\n\n\n \n \n \"Primitive paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{wilson1998primitive,\n  title={Primitive ideals in Hopf algebra extensions},\n  author={Wilson, Mark C.},\n  journal={arXiv preprint math/9808122},\n  year={1998},\n  keywords={algebra},\n  url_Paper={https://arxiv.org/pdf/math/9808122.pdf},\n  abstract={My last paper in algebra, never published formally.}\n}\n\n
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\n My last paper in algebra, never published formally.\n
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\n \n\n \n \n Wilson, M. C.\n\n\n \n \n \n \n \n Bell's primeness criterion and the simple Lie superalgebras.\n \n \n \n \n\n\n \n\n\n\n Journal of Pure and Applied Algebra, 133(1-2): 241-260. 1998.\n \n\n\n\n
\n\n\n\n \n \n \"Bell's paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{wilson1998bell,\n  title={Bell's primeness criterion and the simple Lie superalgebras},\n  author={Wilson, Mark C.},\n  journal={Journal of Pure and Applied Algebra},\n  volume={133},\n  number={1-2},\n  pages={241-260},\n  year={1998},\n  publisher={North-Holland},\n  keywords={algebra},\n  url_Paper={https://www.sciencedirect.com/science/article/pii/S0022404997001990},\n  abstract={We determine all finite-dimensional simple Lie superalgebras $L$ such\nthat $U(L)$ satisfies a primeness criterion due to Bell. Some open\nproblems related to primeness of enveloping algebras are listed.}\n}\n\n
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\n We determine all finite-dimensional simple Lie superalgebras $L$ such that $U(L)$ satisfies a primeness criterion due to Bell. Some open problems related to primeness of enveloping algebras are listed.\n
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\n \n\n \n \n Wilson, M. C.; and Pritchard, G.\n\n\n \n \n \n \n \n Primeness of the enveloping algebra of the special Lie superalgebras.\n \n \n \n \n\n\n \n\n\n\n Archiv der Mathematik, 70(3): 187-196. 1998.\n \n\n\n\n
\n\n\n\n \n \n \"Primeness paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{wilson1998primeness,\n  title={Primeness of the enveloping algebra of the special Lie superalgebras},\n  author={Wilson, Mark C. and Pritchard, Geoffrey},\n  journal={Archiv der Mathematik},\n  volume={70},\n  number={3},\n  pages={187-196},\n  year={1998},\n  publisher={Birkh{\\"a}user Verlag},\n  keywords={algebra},\n  url_Paper={https://link.springer.com/article/10.1007/s000130050183},\n  abstract={A primeness criterion due to Bell is shown to apply to the universal\nenveloping algebra of the Cartan type Lie superalgebras $S(V)$ and\n$\\widetilde{S}(V;t)$ when $\\dim V$ is even. On the other hand, if $\\dim\nV$ is odd then $U(S(V))$ is never semiprime.}\n}\n\n
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\n A primeness criterion due to Bell is shown to apply to the universal enveloping algebra of the Cartan type Lie superalgebras $S(V)$ and $\\widetilde{S}(V;t)$ when $\\dim V$ is even. On the other hand, if $\\dim V$ is odd then $U(S(V))$ is never semiprime.\n
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\n  \n 1997\n \n \n (3)\n \n \n
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\n \n\n \n \n Wilson, M. C.\n\n\n \n \n \n \n \n Crossed products of restricted enveloping algebras.\n \n \n \n \n\n\n \n\n\n\n Communications in Algebra, 25(2): 487-496. 1997.\n \n\n\n\n
\n\n\n\n \n \n \"Crossed paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{wilson1997crossed,\n  title={Crossed products of restricted enveloping algebras},\n  author={Wilson, Mark C.},\n  journal={Communications in Algebra},\n  volume={25},\n  number={2},\n  pages={487-496},\n  year={1997},\n  publisher={Taylor \\& Francis},\n  keywords={algebra},\n  url_Paper={https://www.tandfonline.com/doi/abs/10.1080/00927879708825868},\n  abstract={Let $K$ be a field of characteristic $p>0$, let $L$ be a restricted Lie\nalgebra and let $R$ be an associative $K$-algebra. It is shown that the\nvarious constructions in the literature of crossed product of  $R$ with\n$u(L)$ are equivalent. We calculate explicit formulae relating the\nparameters involved and obtain a formula which hints at a noncommutative\nversion of the Bell polynomials.}\n}\n\n
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\n Let $K$ be a field of characteristic $p>0$, let $L$ be a restricted Lie algebra and let $R$ be an associative $K$-algebra. It is shown that the various constructions in the literature of crossed product of $R$ with $u(L)$ are equivalent. We calculate explicit formulae relating the parameters involved and obtain a formula which hints at a noncommutative version of the Bell polynomials.\n
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\n \n\n \n \n Wilson, M. C.; Pritchard, G.; and Wood, D. H.\n\n\n \n \n \n \n \n Bell's primeness criterion for $W(2n+ 1)$.\n \n \n \n \n\n\n \n\n\n\n Experimental Mathematics, 6(1): 77-85. 1997.\n \n\n\n\n
\n\n\n\n \n \n \"Bell's paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{wilson1997bell,\n  title={Bell's primeness criterion for $W(2n+ 1)$},\n  author={Wilson, Mark C. and Pritchard, Geoffrey and Wood, David H.},\n  journal={Experimental Mathematics},\n  volume={6},\n  number={1},\n  pages={77-85},\n  year={1997},\n  publisher={Taylor \\& Francis Group},\n  keywords={algebra},\n  url_Paper={https://doi.org/10.1080/10586458.1997.10504352},\n  abstract={On the basis of experimental work involving matrix computations, we\nconjecture that a criterion due to Bell for primeness of the universal\nenveloping algebra of a Lie superalgebra applies to the Cartan type Lie\nsuperalgebras $W(n)$ for $n=3$ but does not apply for odd $n\\geq 5$. The\nexperiments lead to a rigorous proof, which we present.}\n}\n\n
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\n On the basis of experimental work involving matrix computations, we conjecture that a criterion due to Bell for primeness of the universal enveloping algebra of a Lie superalgebra applies to the Cartan type Lie superalgebras $W(n)$ for $n=3$ but does not apply for odd $n≥ 5$. The experiments lead to a rigorous proof, which we present.\n
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\n \n\n \n \n Wilson, M. C.\n\n\n \n \n \n \n \n Primeness of the enveloping algebra of Hamiltonian superalgebras.\n \n \n \n \n\n\n \n\n\n\n Bulletin of the Australian Mathematical Society, 56(3): 483-488. 1997.\n \n\n\n\n
\n\n\n\n \n \n \"Primeness paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{wilson1997primeness,\n  title={Primeness of the enveloping algebra of Hamiltonian superalgebras},\n  author={Wilson, Mark C.},\n  journal={Bulletin of the Australian Mathematical Society},\n  volume={56},\n  number={3},\n  pages={483-488},\n  year={1997},\n  publisher={Cambridge University Press},\n  keywords={algebra},\n  url_Paper={https://www.cambridge.org/core/journals/bulletin-of-the-australian-mathematical-society/article/primeness-of-the-enveloping-algebra-of-hamiltonian-superalgebras/A643AA62E4FAC8098924C1DE44E463C8},\n  abstract={In 1990 Allen Bell presented a sufficient condition for the primeness of\nthe universal enveloping algebra of a Lie superalgebra. Let $Q$ be a\nnonsingular bilinear form on a finite-dimensional vector space over a\nfield of characteristic zero. In this paper we show that Bell's\ncriterion applies to the Hamiltonian Cartan type superalgebras\ndetermined by $Q$, and hence obtain some new prime noetherian rings.}\n}\n\n
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\n In 1990 Allen Bell presented a sufficient condition for the primeness of the universal enveloping algebra of a Lie superalgebra. Let $Q$ be a nonsingular bilinear form on a finite-dimensional vector space over a field of characteristic zero. In this paper we show that Bell's criterion applies to the Hamiltonian Cartan type superalgebras determined by $Q$, and hence obtain some new prime noetherian rings.\n
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\n  \n 1996\n \n \n (1)\n \n \n
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\n \n\n \n \n Wilson, M. C.\n\n\n \n \n \n \n \n Primeness of the enveloping algebra of a Cartan type Lie superalgebra.\n \n \n \n \n\n\n \n\n\n\n Proceedings of the American Mathematical Society, 124(2): 383-387. 1996.\n \n\n\n\n
\n\n\n\n \n \n \"Primeness paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{wilson1996primeness,\n  title={Primeness of the enveloping algebra of a Cartan type Lie superalgebra},\n  author={Wilson, Mark C.},\n  journal={Proceedings of the American Mathematical Society},\n  volume={124},\n  number={2},\n  pages={383-387},\n  year={1996},\n  keywords={algebra},\n  url_Paper={},\n  abstract={We show that a primeness criterion for enveloping algebras of Lie\nsuperalgebras discovered by Bell is applicable to the Cartan type Lie\nsuperalgebras $W(n)$, $n$ even. Other algebras are considered but there\nare no definitive answers in these cases.}\n}\n\n\n\n
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\n We show that a primeness criterion for enveloping algebras of Lie superalgebras discovered by Bell is applicable to the Cartan type Lie superalgebras $W(n)$, $n$ even. Other algebras are considered but there are no definitive answers in these cases.\n
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\n  \n 1995\n \n \n (1)\n \n \n
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\n \n\n \n \n Wilson, M. C.\n\n\n \n \n \n \n \n Delta methods in enveloping algebras of Lie color algebras.\n \n \n \n \n\n\n \n\n\n\n Journal of Algebra, 175(2): 661-696. 1995.\n \n\n\n\n
\n\n\n\n \n \n \"Delta paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n\n\n\n
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@article{wilson1995delta,\n  title={Delta methods in enveloping algebras of Lie color algebras},\n  author={Wilson, Mark C.},\n  journal={Journal of Algebra},\n  volume={175},\n  number={2},\n  pages={661-696},\n  year={1995},\n  publisher={Academic Press},\n  keywords={algebra},\n  url_Paper={https://www.sciencedirect.com/science/article/pii/S0021869385712070},\n  abstract={In recent papers J. Bergen and D.S. Passman have applied so-called\n`Delta methods' to enveloping algebras of Lie superalgebras. This paper\ngeneralizes their results to the class of Lie colour algebras. The\nmethods and results in this paper are very similar to those of Bergen\nand Passman, and many of their proofs generalize easily. However, at\nsome points there are serious difficulties to overcome. The results\nobtained show that if $L$ is a Lie colour algebra then the join of all\nfinite-dimensional ideals of  $L$ controls certain properties of the\nuniversal enveloping algebras  $U(L)$. Specifically, we consider\nprimeness, semiprimeness, constants, semi-invariants, almost constants,\nfaithfulness of the adjoint action, the centre, almost centralizers and\nthe central closure.}\n}\n\n
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\n In recent papers J. Bergen and D.S. Passman have applied so-called `Delta methods' to enveloping algebras of Lie superalgebras. This paper generalizes their results to the class of Lie colour algebras. The methods and results in this paper are very similar to those of Bergen and Passman, and many of their proofs generalize easily. However, at some points there are serious difficulties to overcome. The results obtained show that if $L$ is a Lie colour algebra then the join of all finite-dimensional ideals of $L$ controls certain properties of the universal enveloping algebras $U(L)$. Specifically, we consider primeness, semiprimeness, constants, semi-invariants, almost constants, faithfulness of the adjoint action, the centre, almost centralizers and the central closure.\n
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