Christian Blatter

ETH Zurich (Switzerland)

math.ethz.ch/~blatter

Age: 80

2h
answered Definition of Random Variable on Measure Theory!
3h
answered The complex structure of a complex torus
4h
answered define two functions whose compositions are equal to identity
5h
revised Is $\sin( | z^{2}| )$ ,where z is complex, analytic?
added 95 characters in body
6h
answered Is $\sin( | z^{2}| )$ ,where z is complex, analytic?
9h
answered How do I represent a Mobius Band Triangle Parametrically
1d
comment Line integral and checking its path independence in three dimensions
@PeterKowalski: See my edit.
1d
revised Line integral and checking its path independence in three dimensions
added 285 characters in body
1d
comment Motivation for the Definition of Compact Space
This question has come up many times before. See, e.g., here: math.stackexchange.com/questions/371928/… . It is an "existential" question indeed.
2d
revised Line integral and checking its path independence in three dimensions
added 43 characters in body
2d
revised Line integral and checking its path independence in three dimensions
added 43 characters in body
2d
answered Line integral and checking its path independence in three dimensions
Aug
24
comment Find projection of a point to a ball and box?
"Projection" can be many things. You have to define clearly the geometrical manoeuvres taking place here.
Aug
24
comment Conceptual differences between the notations $\int_{a}^{b}f$ and $\int_{[a,b]}f$
@Chou: This is not "my point of view", but see here: people.math.ethz.ch/~blatter/Analysis_9.pdf (in German). It was amusing for me to learn that Tao in his notes had come almost verbatim to the same explanations.
Aug
24
answered Conceptual differences between the notations $\int_{a}^{b}f$ and $\int_{[a,b]}f$
Aug
24
comment Is it possible to develop Analysis solely from Peano's axioms
@RobArthan: Thank you for letting me read this obituary.
Aug
23
awarded Revival
Aug
23
comment Is it possible to develop Analysis solely from Peano's axioms
The mathematical content of this paper was paid for by the German taxpayer, and thousands of libraries have paid for the printing costs; but sixty years later we are asked $ 40.00 for the opportunity to read a copy.
Aug
23
comment Why is it called a "multiset"?
We're talking about semantics here. Maybe there is a philological stack exchange about semantical correctness of mathematical terms. Are you interested in the content of the notion multiset at all?
Aug
23
comment drawing red and black marbles
The third marble is black with probability ${2\over3}$. I don't see why it "must be black".
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