Talk:Differentiation in Fréchet spaces
Latest comment: 7 years ago by Shhhnotsoloud in topic Merge into Gateaux derivative
Merge into Gateaux derivative
These articles describe the same concept. — Preceding unsigned comment added by 128.120.104.8 (talk) 20:04, 29 August 2014 (UTC)
- See Talk:Gâteaux derivative#Proposing merger with "Differentiation in Frechet spaces" Shhhnotsoloud (talk) 10:14, 12 April 2017 (UTC)
- Question regarding typing
U is an open set of X. X and Y are Frechet spaces, and in particular X and Y are closed to addition. F is a function U to Y.The formal definition of the derivative uses F(u+tv). However, I see no reason that u + tv is in U, and hence F may be undefinedon u + tv. If the limit exists then there is a neighborhood where the addition makes sense and one is taking the limit over t andv such that u+tv is in U? I'm confused.
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