Isaac

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473 Answers

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43	Proof that the irrational numbers are uncountable
37	Examples of results failing in higher dimensions
33	What are some examples of a mathematical result being counterintuitive?
30	Is there a general formula for solving 4th degree equations?
29	A challenge by R. P. Feynman: give counter-intuitive theorems that can be translated into everyday language

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21,095 Reputation

+10	How to prove Euler's formula: $e^{it}=\cos t +i\sin t$?
+10	How do I calculate the new x,y coordinates and width/height of a re-sized group of objects?
+10	Sum of the alternating harmonic series $\sum_{k=1}^{\infty}\frac{(-1)^{k+1}}{k} = \frac{1}{1} - \frac{1}{2} + \cdots $
+10	Proof that the irrational numbers are uncountable

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20 Questions

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28	Bad Fraction Reduction That Actually Works
27	Proving that 1- and 2-d simple symmetric random walks return to the origin with probability 1
20	Useful examples of pathological functions
16	Birthday-coverage problem
14	Mandelbrot-like sets for functions other than $f(z)=z^2+c$?

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140 Tags

441 algebra-precalculus × 132	106 analytic-geometry × 44
438 geometry × 142	98 polynomials × 17
308 calculus × 72	93 homework × 39
238 trigonometry × 79	80 probability × 16
151 euclidean-geometry × 44	71 circle × 23

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