List questions from alternative-proof

Published on 12 Jan 2015 - 13:23

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How to introduce bi-conditional in this proof?

Published on 14 Jan 2015 - 20:45

690

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Prove that the maximum in absolute value of any monic real polynomial of n-th degree on [-1, 1] is not less than $\frac{1}{2^{n-1}}$

Published on 15 Jan 2015 - 21:34

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Next step to take to reach the contradiction?

Published on 15 Jan 2015 - 22:03

388

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$\log_2 13$ is irrational

Published on 26 Mar 2026 - 12:52

21.1k

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How can I complete this proof by contradiction?

Published on 16 Jan 2015 - 23:42

322

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Help with a Royden exercise of measure

Published on 17 Jan 2015 - 2:15

236

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Next step to take in direct proof for one to one?

Published on 17 Jan 2015 - 7:00

3.4k

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An alternative proof to: $P_{[X,Z]}=P_X+M_XZ(Z'M_XZ)^{-1}Z'M_X$

Published on 19 Jan 2015 - 9:56

237

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New proofs of the Fundamental Theorem of Calculus

Published on 29 Mar 2026 - 14:07

854

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Can someone verify my proof by contraposition?

Published on 20 Jan 2015 - 23:18

52

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Trouble solving this induction problem

Published on 21 Jan 2015 - 19:58

2.3k

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Fascinating induction problem with numerous interpretations

Published on 22 Jan 2015 - 14:54

1.5k

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Checking that a $3$-D diagram is commutative

Published on 26 Mar 2026 - 6:20

15.4k

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Prove that $x-1$ is a factor of $x^n-1$

Published on 25 Jan 2015 - 21:08

List Question

Wedge product of a direct sum and the Yoneda Lemma

How to introduce bi-conditional in this proof?

Prove that the maximum in absolute value of any monic real polynomial of n-th degree on [-1, 1] is not less than $\frac{1}{2^{n-1}}$

Next step to take to reach the contradiction?

$\log_2 13$ is irrational

How can I complete this proof by contradiction?

Help with a Royden exercise of measure

Next step to take in direct proof for one to one?

An alternative proof to: $P_{[X,Z]}=P_X+M_XZ(Z'M_XZ)^{-1}Z'M_X$

New proofs of the Fundamental Theorem of Calculus

Can someone verify my proof by contraposition?

Trouble solving this induction problem

Fascinating induction problem with numerous interpretations

Checking that a $3$-D diagram is commutative

Prove that $x-1$ is a factor of $x^n-1$

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