A subfield of a complex Banach algebra is not necessarily topologically isomorphic to a subfield of ℂ
Żelazko, W.
Colloquium Mathematicae, Tome 63 (1992), p. 135-137 / Harvested from The Polish Digital Mathematics Library
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Publié le : 1992-01-01
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     author = {W. \.Zelazko},
     title = {A subfield of a complex Banach algebra is not necessarily topologically isomorphic to a subfield of $\mathbb{C}$},
     journal = {Colloquium Mathematicae},
     volume = {63},
     year = {1992},
     pages = {135-137},
     zbl = {0816.46039},
     language = {en},
     url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-cmv63i1p135bwm}
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Żelazko, W. A subfield of a complex Banach algebra is not necessarily topologically isomorphic to a subfield of ℂ. Colloquium Mathematicae, Tome 63 (1992) pp. 135-137. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-cmv63i1p135bwm/

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[003] [4] C. E. Rickart, General Theory of Banach Algebras, Van Nostrand, Toronto 1960.

[004] [5] W. Żelazko, Banach Algebras, Elsevier, Amsterdam 1973.