The parabolic differential equations and the associated semi-groups of transformations. Feller, W. Ann. of Math. (2), 55:468–519, 1952.
The parabolic differential equations and the associated semi-groups of transformations [link]Paper  doi  bibtex   
@article{MR0047886,
	Author = {Feller, William},
	Date-Added = {2019-01-14 08:05:17 -0600},
	Date-Modified = {2019-01-14 08:05:17 -0600},
	Doi = {10.2307/1969644},
	Fjournal = {Annals of Mathematics. Second Series},
	Issn = {0003-486X},
	Journal = {Ann. of Math. (2)},
	Mrclass = {36.0X},
	Mrnumber = {0047886},
	Mrreviewer = {K. Yosida},
	Pages = {468--519},
	Title = {The parabolic differential equations and the associated semi-groups of transformations},
	Url = {https://doi.org/10.2307/1969644},
	Volume = {55},
	Year = {1952},
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