Question

Integer solutions of the factorial equation $(x!+1)(y!+1)=(x+y)!$

score 239 · Answer 1 · 2014-08-16 23:35:13

239

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Integer solutions of the factorial equation $(x!+1)(y!+1)=(x+y)!$

Published on 16 Aug 2014 - 23:35

score 128 · Answer 2 · 2014-08-18 01:42:41

128

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Simplify factorials into a combinatorial formula

Published on 18 Aug 2014 - 1:42

score 166 · Answer 3 · 2014-08-20 03:06:40

166

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What is the mathamatical term for this programming concept?

Published on 20 Aug 2014 - 3:06

score 59 · Answer 4 · 2014-08-20 09:19:18

59

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Fundamental principale of permutations

Published on 20 Aug 2014 - 9:19

score 670 · Answer 5 · 2026-03-26 19:20:54

670

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Proving combinatorial identity with the product of Stirling numbers of the first and second kinds

Published on 26 Mar 2026 - 19:20

score 118 · Answer 6 · 2014-08-22 05:00:23

118

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How to find the limit of $ {n! e^n}/{n^{n+1/2}} $?

Published on 22 Aug 2014 - 5:00

score 1.7k · Answer 7 · 2014-08-23 01:39:54

1.7k

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Approximating $100!$

Published on 23 Aug 2014 - 1:39

score 154 · Answer 8 · 2014-08-24 04:35:11

154

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Use induction to prove the following: $1! + 2! + .... + n! \le (n + 1)!$

Published on 24 Aug 2014 - 4:35

score 83 · Answer 9 · 2014-08-25 01:21:19

83

Views

Prove $1! + 2! + . . . + n! < (n + 1)!$ using mathematical induction

Published on 25 Aug 2014 - 1:21

score 151 · Answer 10 · 2014-08-25 17:00:34

151

Views

Counting zeros in a factorial(terminal + zeros in between digits)

Published on 25 Aug 2014 - 17:00

score 185 · Answer 11 · 2014-08-26 16:06:04

185

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How to find the remainder when the following series is divided by 12?

Published on 26 Aug 2014 - 16:06

score 2.9k · Answer 12 · 2014-08-27 03:08:22

2.9k

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Finding a formula for $1+\sum_{j=1}^n(j!)\cdot j$ using induction

Published on 27 Aug 2014 - 3:08

score 584 · Answer 13 · 2014-08-28 11:36:58

584

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Finding $\frac{\mathrm d}{\mathrm dx} x!$

Published on 28 Aug 2014 - 11:36

score 117 · Answer 14 · 2014-08-29 09:38:27

117

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Any nice way to find number number of single digit ordered pairs $(a, b)$ such that $a!b! \gt a!+b!$

Published on 29 Aug 2014 - 9:38

score 736 · Answer 15 · 2014-08-30 18:49:52

736

Views

Closed-forms of infinite series with factorial in the denominator

Published on 30 Aug 2014 - 18:49

List Question

Integer solutions of the factorial equation $(x!+1)(y!+1)=(x+y)!$

Simplify factorials into a combinatorial formula

What is the mathamatical term for this programming concept?

Fundamental principale of permutations

Proving combinatorial identity with the product of Stirling numbers of the first and second kinds

How to find the limit of $ {n! e^n}/{n^{n+1/2}} $?

Approximating $100!$

Use induction to prove the following: $1! + 2! + .... + n! \le (n + 1)!$

Prove $1! + 2! + . . . + n! < (n + 1)!$ using mathematical induction

Counting zeros in a factorial(terminal + zeros in between digits)

How to find the remainder when the following series is divided by 12?

Finding a formula for $1+\sum_{j=1}^n(j!)\cdot j$ using induction

Finding $\frac{\mathrm d}{\mathrm dx} x!$

Any nice way to find number number of single digit ordered pairs $(a, b)$ such that $a!b! \gt a!+b!$

Closed-forms of infinite series with factorial in the denominator

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