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May
3
reviewed Approve Converting recurrence into matrix
Apr
26
awarded  Inquisitive
Apr
25
comment Find all solutions to integral equation
Why $F$ has to be continuous, when $f,h \in L^2$?
Apr
25
comment Find all solutions to integral equation
Consider it as part of the problem, for given $f,F$ is there such $h$? and how nice the $h$ is?
Apr
25
comment Find all solutions to integral equation
Well I have no strict requirements on those functions. They probably have to be $L^2$ to make sense of those integrals. But you can assume that they are continuous if you want to.
Apr
25
asked Find all solutions to integral equation
Apr
6
asked Bochner-Sobolev space definition
Mar
26
awarded  Custodian
Mar
26
reviewed Approve Prove the following recurrence: $F_{2n+1}=3F_{2n-1}-F_{2n-3}$
Mar
17
comment Decomposable elements of $\Lambda^k(V)$
Beautiful! After two years I got the answer :D That is what I call, necromancy done well!
Mar
17
accepted Decomposable elements of $\Lambda^k(V)$
Mar
8
awarded  Custodian
Mar
8
reviewed Reviewed Picking a delta for a convenient epsilon?
Mar
7
comment If for any $\varepsilon$ exists $\delta$, does that mean that for every $\delta$ exists $\varepsilon$?
@NajibIdrissi Did you intentionaly swap arguments of $P$? Because $\forall \epsilon \exists \delta P(\delta, \epsilon)$ does not imply $\forall \delta \exists \epsilon P(\delta, \epsilon)$.
Feb
25
accepted Quaternions as a counterexample to the Gelfand–Mazur theorem
Feb
25
awarded  Nice Answer
Feb
24
comment Quaternions as a counterexample to the Gelfand–Mazur theorem
I think probably the same but I don't know what means for scalar multiplication to be bilinear. The algebra multiplication has to be $\mathbb{C}$-bilinear which is not in the case of quaterions.
Feb
24
asked Quaternions as a counterexample to the Gelfand–Mazur theorem
Feb
24
comment Apparent counter example to Stoke's theorem?
Plus did you take course in complex analysis? Your closed form is exactly $\frac1{z}$ for which is troublesome to find anti-derivative on whole $\mathbb{C}$.
Feb
24
comment Apparent counter example to Stoke's theorem?
Yup, exactly...