Julia

Germany

1d
awarded Promoter
Nov
22
awarded Popular Question
Nov
8
awarded Notable Question
Oct
19
comment Asymptote of solution of a differential equation without solving it
I don't really understand why it is sufficient to show that $u'(x) > 0$ for all $x$ and why this it the case. If $u'(x_0) = 0$ for some $x_0$, why is this automatically the case for all $x$?
Oct
18
revised Intiutive argument that $\exp' = \exp$
edited tags
Oct
15
revised Intiutive argument that $\exp' = \exp$
edited tags
Oct
15
comment Intiutive argument that $\exp' = \exp$
@mookid It's for a high school course. The real numbers are known only on a heuristic middle school level (via examples like $\sqrt{2}$ and $\pi$, nested intervals etc. Powers are introduced usually just for rational numbers and real powers via nested intervals (or sometimes just with reference to the calculater - which is really sad, but I don't have the time to rework those foundations, I just want to give a nice argument for the derivative of $\exp$ despite of the spongy foundations :-()
Oct
15
comment Intiutive argument that $\exp' = \exp$
But how to show that $\exp'(0) = 1$?
Oct
15
asked Intiutive argument that $\exp' = \exp$
Oct
15
awarded Nice Question
Oct
1
asked Induced emf in a circular conducting wheel
Sep
28
awarded Nice Question
Sep
28
awarded Scholar
Sep
28
comment Automatically generate graphics which shows light diffusion on a rough surface
Amazing! Thank you very much. Just a little detail: How can it, such that the arrow tips are in the middle of the incoming and outcoming lines (and not at the end of the outcoming ones)?
Sep
28
accepted Automatically generate graphics which shows light diffusion on a rough surface
Sep
28
revised Automatically generate graphics which shows light diffusion on a rough surface
edited tags
Sep
28
revised Automatically generate graphics which shows light diffusion on a rough surface
deleted 1 character in body
Sep
28
awarded Editor
Sep
28
revised Automatically generate graphics which shows light diffusion on a rough surface
added 16 characters in body
Sep
28
awarded Student
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