Christian Blatter

ETH Zurich (Switzerland)

math.ethz.ch/~blatter

Age: 79

1h
answered Volume of the intersection of two lp balls.
6h
answered Is there a symbol for integrating and setting $C=0$?
7h
revised Equal-area spherical shell partitioning
added 250 characters in body
20h
comment if this function $f$ is homeomorphic then have $V=R^n$
@Hagen von Eitzen: There is something wrong with your example. The function $f$ doesn't map $V$ onto ${\mathbb R}$.
21h
comment Equal-area spherical shell partitioning
While the above approach is admittedly naive it certainly produces patches of equal area. It is a basic fact of spherical geometry that the area of spherical "lampshades" is proportional to their height $\Delta z$.
1d
answered Showing that $\int_{c} \omega =0$ when $\partial c =0$
1d
answered how to prove that the curvature of sin x is greatest at its extremum?
1d
revised Prove that $\frac{\sin n}{n}$ is a Cauchy sequence from the definition.
edited body
1d
answered Equal-area spherical shell partitioning
1d
answered Prove that $\frac{\sin n}{n}$ is a Cauchy sequence from the definition.
1d
comment Why can triple integrals be used to represent the volume under a surface f(x,y) by setting f(x,y,z) = 1?
If you really understand what a triple integral is (namely a limit of Riemann sums using partitions of the given body $B$ into ever smaller pieces $B_k$) this should be intuitively obvious.
2d
revised How can I calculate the norm of this linear functional on $\mathbb R^3$
added 56 characters in body
Dec
26
answered Show that $f(x) = x\cos^3(x)$ is not uniformly continuous on $\mathbb{R}$
Dec
26
revised How can I calculate the norm of this linear functional on $\mathbb R^3$
added 388 characters in body
Dec
25
comment How can I calculate the norm of this linear functional on $\mathbb R^3$
Tell us the norm you want to use, and we shall see what we can do.
Dec
25
answered How can I calculate the norm of this linear functional on $\mathbb R^3$
Dec
25
comment Advanced Calculus Question
Note that $f(1)=e$ and $f(-1)=e$.
Dec
24
comment Total no. of solutions of $dy/dx + |y| =0 , \ y (0)=0$
There is no other answer answering your question.
Dec
24
answered Total no. of solutions of $dy/dx + |y| =0 , \ y (0)=0$
Dec
23
answered Sum of functions bounded between 0 and 1?
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