Christian Blatter

ETH Zurich (Switzerland)

math.ethz.ch/~blatter

Age: 79

42m
answered How to establish the formula for area of a triangle using the axioms of area?
Oct
13
awarded Nice Answer
Oct
12
revised Number of binary trees with N nodes
added 70 characters in body
Oct
12
comment How to prove that S = {$(x,y)| y > x^2$} is open?
@augurar: I don't think so. Note that $b>a^2$ by assumption on $P$.
Oct
11
revised how to define a circular helix in terms of the Frenet Frame
added 379 characters in body
Oct
11
revised Boundary points of a domain bounded by a continuous curve
added 612 characters in body
Oct
11
answered Number of binary trees with N nodes
Oct
11
answered Boundary points of a domain bounded by a continuous curve
Oct
10
comment Do there exist space-filling curves that fill the whole plane? If so, can they be visualized?
@kuzzooroo: See my edit, with sketch of proof.
Oct
10
revised Do there exist space-filling curves that fill the whole plane? If so, can they be visualized?
added 557 characters in body
Oct
10
comment Infinite staircase to a circle
Numerically one obtains ${y_n\over x_n}\to0.79995\ldots$; but the limit point is definitely not $\bigl({5\over\sqrt{41}},{4\over\sqrt{41}}\bigr)$.
Oct
10
revised Do there exist space-filling curves that fill the whole plane? If so, can they be visualized?
added 227 characters in body
Oct
9
answered Chords of a circle
Oct
9
answered Coloring of a normal map
Oct
9
answered Do there exist space-filling curves that fill the whole plane? If so, can they be visualized?
Oct
9
answered An ant on an infinite chessboard
Oct
8
answered how to define a circular helix in terms of the Frenet Frame
Oct
8
answered Counting the ways to color $k$ marbles blue in the circle with $m$ red marbles such that no neighbouring blue marbles
Oct
8
awarded multivariable-calculus
Oct
7
comment What is the maximum difference between two successive real numbers in the given floating point representation?
@Atul Gangwar: When $e\leq40$ the jumps are $\leq1$, when $e\geq 41$ the jumps are $\geq2$, and your conclusion follows.
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