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Questions of the kind "What's the name for a X that satisfies property Y?"

41 votes
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Why the name 'separable' space?

As far as I know the word separable was introduced by M. Fréchet in Sur quelques points du calcul fonctionnel, Rend. Circ. Mat. Palermo 22 (1906), 1-74. The paper can be obtained via this link (Spring …
Theo Buehler's user avatar
  • 5,743
11 votes

Morphisms of Banach spaces

I don't know if there's a universally accepted name for this notion. Of course, if the kernel and the complement of the image are finite-dimensional, such a map is a Fredholm operator. I would suggest …
Theo Buehler's user avatar
  • 5,743