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2336
bio website ephorie.de
location Germany
age 44
visits member for 4 years, 4 months
seen 8 hours ago

just an amateur fascinated by math


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comment What are some conceptualizations that work in mathematics but are not strictly true?
That is better :-)
Jul
24
comment What are some conceptualizations that work in mathematics but are not strictly true?
But you didn't say that a line has to be straight.
Jul
24
comment What are some conceptualizations that work in mathematics but are not strictly true?
Whether this is true or not depends on the axiomatic system and how you define "line".
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comment What's going on in Ito calculus?
Could you tell us which books did you find and what exactly is missing there?
May
16
asked Why do you need an integral to invert the Z-Transform?
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15
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May
15
comment Example for finite dimensional analog of integral transforms
I tried this with Mathematica and the vector $\{1,2,3,4,5\}$. The result after multiplying with $B(z)$ and transforming back should be $\{1,1,1,1,1\}$ because these are the first differences, right? (I am not sure about the last one, but anyway). Interestingly after multiplying with $B(z)$ I get $\{1,2,3,4,5\}$ and transforming this back gives the discrete delta function times $\{1,2,3,4,5\}$: wolframalpha.com/input/… - what's wrong?!?
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15
comment Example for finite dimensional analog of integral transforms
This is exactly what I was looking for! Thank you very much indeed! :-)
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accepted Example for finite dimensional analog of integral transforms
May
14
comment Example for finite dimensional analog of integral transforms
@MattL. Ok, I tried this with vectors but there are still things that don't work out :-( If you gave me an example with the z-transform on vectors where multiplication/division becomes differentiation/integration I would happily accept your answer :-) Thank you