Christian Blatter

ETH Zurich (Switzerland)

math.ethz.ch/~blatter

Age: 80

10h
answered Help with proving a statement based on riemann sums?
11h
answered If $f$ function then $f^{-1}$ function iff $f$ function injective (one-to-one).
13h
answered Proving a basis in linear algebra
16h
comment I like to know if there is approximated expression of something
Doing a partial integration I get $$\int_0^x{t^9\over9!}e^{-t}\>dt=-{t^9\over 9!}e^{-t}\biggr|_0^x+\int_0^x{t^8 \over 8!}e^{-t}\>dt\ ,$$ giving a first term $-{x^9\over 9!}e^{-x}$.
16h
revised Is there a Mobius (infinite) cylinder?
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19h
answered Is there a Mobius (infinite) cylinder?
20h
answered Find area of shaded area in curve with range of values for $y$
1d
answered How to solve $2^x < x^2$
1d
answered How do I transpose an ellipse function to stretch the ellipse into curved space?
1d
revised Evaluating $\int_{0}^{3} \sqrt{1+x}\: dx$ using Limit of a Sum approach
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1d
answered Prove this exp and log inequality?
2d
answered Evaluating $\int_{0}^{3} \sqrt{1+x}\: dx$ using Limit of a Sum approach
2d
revised Horizontal tangent line of a parametric curve
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2d
comment Probability with n dice
@ByronSchmuland: Thank you for spotting the slip.
2d
revised Probability with n dice
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2d
revised Water filling problem in Blocks - Algebra Question
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2d
answered Probability with n dice
2d
answered Horizontal tangent line of a parametric curve
2d
comment A piecewise regular simple closed curve bisects the area of the unit sphere if and only if it has total geodesic curvature 0
Take a look at the Gauss-Bonnet theorem.
2d
answered Having trouble deriving the symbols used in a quadratric approximation problem.
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