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Nov
18
accepted Cauchy product and the exponential function
Nov
18
comment Cauchy product and the exponential function
WolframAlpha showed me that I should get $1/2\sin(2x)$ as a result, however the $4^n$ makes it difficult to derive the fact that I have to get $(2x)^{2n+1}$ and the $1/2$ in front of everything. This is what I want to know right now.
Nov
18
comment Cauchy product and the exponential function
@BrianM.Scott: I have made another approach, may I ask you to have a look at it?
Nov
18
revised Cauchy product and the exponential function
added second attempt of this problem
Nov
17
comment Cauchy product and the exponential function
@BrianM.Scott: Now I do understand this - do you have a hint (rather than the solution ;) ) for the second series for me?
Nov
17
comment Cauchy product and the exponential function
@BrianM.Scott: But you have $\sum_{n\ge 0}\frac{2^n}{n!}=(e-1)^2$ and that confuses me.
Nov
17
comment Cauchy product and the exponential function
@BrianM.Scott: I have a question. Your first result is $(e-1)^2$ but I think it should be $e^2$, shouldn't it?
Nov
17
comment Cauchy product and the exponential function
Thanks I will have a look at that now. @Cocopuffs: I think the indexes should start at 0 so I wrote an email to our TA but nevertheless I can learn that the hard way.
Nov
17
asked Cauchy product and the exponential function
Nov
17
accepted Polar coordinates - issue with direction denoted by angle
Nov
17
comment Polar coordinates - issue with direction denoted by angle
Actually I don't know, but now it seems comprehensible what you said.
Nov
17
revised Polar coordinates - issue with direction denoted by angle
edited body
Nov
17
asked Polar coordinates - issue with direction denoted by angle
Nov
16
revised LaTeX help - multiple answers using set bracket / cases
added 65 characters in body
Nov
15
accepted Is a statement concerning the future part of a decidable problem?
Nov
15
comment Is a statement concerning the future part of a decidable problem?
@ThomasAndrews: Ah ok, one last question - is there any yes/no question which is NOT decidable?
Nov
15
comment Is a statement concerning the future part of a decidable problem?
@ThomasAndrews: What about a scenario where the monitored process will last infinite long?
Nov
15
asked Is a statement concerning the future part of a decidable problem?
Nov
14
revised Is this language and its complement is Context free Language?
deleted 144 characters in body
Nov
14
comment Is this language and its complement is Context free Language?
@BrianM.Scott: I know that - my first answer was quite messy and everything is now... yeah. Thanks for the remark.