Question

Transforming the inequality bellow

score 33 · Answer 1 · 2018-10-07 13:48:27

33

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Transforming the inequality bellow

Published on 07 Oct 2018 - 13:48

score 194 · Answer 2 · 2018-10-09 03:17:15

194

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Quadratic equation approach used in one of the gre questions

Published on 09 Oct 2018 - 3:17

score 3.9k · Answer 3 · 2018-10-09 22:28:31

3.9k

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We have $5$ red, $3$ blue and $2$ green balls. We take $3$ of them at random. What is the probability that they are of different colors?

Published on 09 Oct 2018 - 22:28

score 179 · Answer 4 · 2018-10-10 08:06:35

179

Views

4 professors and 7 students are to be seated on 11 chairs. What is the probability that every professor is between 2 students?

Published on 10 Oct 2018 - 8:06

score 73 · Answer 5 · 2018-10-10 19:06:17

73

Views

Consequences of replacing $|a_n-a|<\epsilon $ with other assertions involving $\epsilon$ on the convergence of real sequences

Published on 10 Oct 2018 - 19:06

score 104 · Answer 6 · 2026-03-22 19:57:10

104

Views

face map $d_i^n:\Delta^{n-1}\to\Delta^n$

Published on 22 Mar 2026 - 19:57

score 644 · Answer 7 · 2018-10-13 17:01:56

644

Views

IMO 2011: Prove that, for all integers $m$ and $n$ with $f(m)<f(n)$, the number $f(n)$ is divisible by $f(m)$

Published on 13 Oct 2018 - 17:01

score 6.9k · Answer 8 · 2018-10-13 22:51:03

6.9k

Views

For symmetric $A$ and $B$, show that $AB$ is symmetric if $AB=BA$?

Published on 13 Oct 2018 - 22:51

score 64 · Answer 9 · 2026-03-22 10:11:03

64

Views

Is this a correct mathematical statement about integers mod n and congruence mod n?

Published on 22 Mar 2026 - 10:11

score 698 · Answer 10 · 2018-10-18 20:06:53

698

Views

Redunduncy of Pasch's Axiom of Hilbert's Foundations of Geometry

Published on 18 Oct 2018 - 20:06

score 198 · Answer 11 · 2018-10-20 06:03:10

198

Views

Suppose $g(z)$ is analytic at $z_0$. Proof $g(z)$ has zero of order $m$ at $z_0$ iff $ \lim_{z\rightarrow z_0} \frac{g(z)}{(z-z_0)^m} \neq 0$.

Published on 20 Oct 2018 - 6:03

score 133 · Answer 12 · 2018-10-22 16:54:06

133

Views

Are these gcd proofs valid?

Published on 22 Oct 2018 - 16:54

score 171 · Answer 13 · 2018-10-23 03:01:58

171

Views

Show that $\overline{A} \subseteq \overset{\,\,\,\circ} A\cup \partial A$

Published on 23 Oct 2018 - 3:01

score 641 · Answer 14 · 2018-10-25 22:49:07

641

Views

Proof of d'Alembert's ratio test: for sequences tending to infinity

Published on 25 Oct 2018 - 22:49

score 1.1k · Answer 15 · 2018-10-30 19:51:14

1.1k

Views

Product of a convergent series and a bounded sequence - Absolutely convergent?

Published on 30 Oct 2018 - 19:51

List Question

Transforming the inequality bellow

Quadratic equation approach used in one of the gre questions

We have $5$ red, $3$ blue and $2$ green balls. We take $3$ of them at random. What is the probability that they are of different colors?

4 professors and 7 students are to be seated on 11 chairs. What is the probability that every professor is between 2 students?

Consequences of replacing $|a_n-a|<\epsilon $ with other assertions involving $\epsilon$ on the convergence of real sequences

face map $d_i^n:\Delta^{n-1}\to\Delta^n$

IMO 2011: Prove that, for all integers $m$ and $n$ with $f(m)<f(n)$, the number $f(n)$ is divisible by $f(m)$

For symmetric $A$ and $B$, show that $AB$ is symmetric if $AB=BA$?

Is this a correct mathematical statement about integers mod n and congruence mod n?

Redunduncy of Pasch's Axiom of Hilbert's Foundations of Geometry

Suppose $g(z)$ is analytic at $z_0$. Proof $g(z)$ has zero of order $m$ at $z_0$ iff $ \lim_{z\rightarrow z_0} \frac{g(z)}{(z-z_0)^m} \neq 0$.

Are these gcd proofs valid?

Show that $\overline{A} \subseteq \overset{\,\,\,\circ} A\cup \partial A$

Proof of d'Alembert's ratio test: for sequences tending to infinity

Product of a convergent series and a bounded sequence - Absolutely convergent?

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