User maq - Mathematics Stack Exchange

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	938 reputation	bio	website		visits	member for	2 years, 6 months
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Summation involving a factorial: $1 + \sum_{j=1}^{n} j!j$

factorial sequences-and-series

feb 16 at 12:09 Zev Chonoles 53.8k

0

votes

1

answer

2

kviews

Finding the unit vectors parallel to a tangent line

multivariable-calculus

feb 7 '11 at 1:52 Arturo Magidin 158k

4

votes

4

answers

2

kviews

Number of relations that are both symmetric and reflexive

combinatorics discrete-mathematics relations

nov 28 '10 at 3:42 TCL 5,355

3

votes

1

answer

2

kviews

Determining if two graphs are isomorphic

graph-theory trees

dec 2 at 23:47 Iydwv Cxscujtdo 31

2

votes

1

answer

2

kviews

Question on essential prime implicants

boolean-algebra

oct 9 '11 at 7:12 pedja 6,811

1

7

votes

3

answers

1

kviews

Parametrization of a line

calculus parametric

feb 15 '11 at 6:20 Michele Kakusi 415

1

vote

2

answers

1

kviews

Euler's formula for connected planar graphs

graph-theory

nov 28 '10 at 23:33 Joseph Malkevitch 3,532

5

30

votes

3

answers

1

kviews

$e$ to 50 billion decimal places

calculus soft-question taylor-expansion

dec 1 '10 at 3:51 Arturo Magidin 158k

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votes

3

answers

1

kviews

The set of rationals has the same cardinality as the set of integers

elementary-set-theory

dec 22 '10 at 21:21 asmeurer 1,757

22

23

votes

4

answers

1

kviews

Understanding the intuition behind math

intuition math-history

feb 27 '11 at 6:40 Vicfred 726

3

votes

2

answers

1

kviews

Number of terms in a trinomial expansion

number-theory homework discrete-mathematics

mar 26 at 22:34 Stahl 3,617

4

votes

3

answers

1

kviews

Determining don't-care values in a Karnaugh Map

boolean-algebra

oct 22 at 7:59 Norbert 20.3k

0

votes

2

answers

927

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Finding parametric and symmetric equations for a line

linear-algebra

feb 18 '11 at 1:08 Boy Simone 188

1

vote

1

answer

690

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Transitive and reflexive graph

graph-theory relations

nov 27 '10 at 20:49 sepp2k 756

1

3

votes

3

answers

672

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Proving a relation is antisymmetric

relations

dec 2 '10 at 6:34 Arturo Magidin 158k

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3

votes

2

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644

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Counting number of moves on a grid

combinatorics discrete-mathematics permutations

nov 27 '10 at 23:16 Arturo Magidin 158k

1

vote

2

answers

561

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Combinations and Permutations Question

combinatorics homework discrete-mathematics

nov 28 '10 at 4:07 Arturo Magidin 158k

4

votes

1

answer

537

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Finding an equation of a plane

calculus

feb 3 '11 at 2:38 yunone 10.8k

1

6

votes

4

answers

522

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Mathematical functions that can't be computed

combinatorics

dec 14 '10 at 17:04 comonad 179

2

votes

1

answer

426

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Factorial of a non-integer number

number-theory factorial

nov 27 '10 at 20:05 Timothy Wagner 6,153

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2

votes

1

answer

418

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Empty set and power sets

elementary-set-theory

nov 27 '10 at 21:30 Nuno 1,614

2

3

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2

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398

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Real numbers and countability

elementary-set-theory

nov 27 '10 at 21:30 Nuno 1,614

2

votes

1

answer

357

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Integration and natural log question

calculus integral

dec 10 '10 at 0:49 J. M. 38.9k

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vote

3

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353

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Finding equation of parabola

conic-sections

dec 9 '10 at 2:58 Arturo Magidin 158k

2

votes

3

answers

337

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Number of possible solutions for an equation

number-theory homework discrete-mathematics

nov 22 at 4:04 ctype.h 599

1

vote

1

answer

317

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Pigeonhole principle question

number-theory combinatorics pigeonhole-principle

nov 27 '10 at 19:45 Pete L. Clark 44.6k

4

votes

3

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303

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Sum of $n$ consecutive numbers divided by $n$

number-theory

dec 22 '10 at 20:20 Community♦ 1

1

vote

3

answers

301

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Find a pattern in a recursive definition

homework elementary-number-theory elementary-set-theory discrete-mathematics

dec 7 '11 at 3:24 Srivatsan 15.6k

2

4

votes

4

answers

278

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How to find $3^{1000}\bmod 7$?

modular-arithmetic

oct 9 at 2:24 Gerry Myerson 85.9k

0

votes

1

answer

278

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Maximum height of a quad tree

trees

apr 6 '11 at 19:31 Ross Millikan 83.5k

maq

49 Questions