User miracle173 - Mathematics Stack Exchange

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	840 reputation	bio	website		visits	member for	2 years
511 badges		location	Vienna, Austria		seen	Apr 13 at 9:03

7

15

votes

11

answers

8

kviews

Real world applications of prime numbers?

prime-numbers applications

may 2 at 18:00 user75573 11

29

130

votes

19

answers

4

kviews

Why don't we define “imaginary” numbers for every “impossibility”?

soft-question

dec 21 at 3:57 bibo 1

5

15

votes

5

answers

2

kviews

Why do we use a Least Squares fit?

statistics regression

jan 24 at 5:02 Nikhil Panikkar 433

2

8

votes

2

answers

2

kviews

If $f(xy)=f(x)f(y)$ then show that $f(x) = x^t$ for some t

functional-equations

jun 8 '11 at 14:51 André Nicolas 160k

4

8

votes

5

answers

1

kviews

Does a finite commutative ring necessarily have a unity?

abstract-algebra ring-theory rngs

jan 30 at 16:26 Steven Gamer 135

32

60

votes

6

answers

1

kviews

Contest problem about convergent series

real-analysis sequences-and-series contest-math

nov 21 at 20:48 robjohn♦ 59.2k

9

27

votes

2

answers

1

kviews

A zero sum subset of a sum-full set

combinatorics

jun 10 '11 at 23:17 Aryabhata 47.5k

5

16

votes

7

answers

902

views

What am I losing if I decide to perform all math by computer?

soft-question advice

sep 1 at 2:56 Makoto Kato 11.3k

4

18

votes

5

answers

786

views

Integer solutions to $\sqrt{a} + \sqrt{b} = \sqrt{c}$

number-theory

dec 1 at 22:37 Hagen von Eitzen 41.8k

7

29

votes

2

answers

653

views

Does $2x^2-1=y^5$ have a solution in integers, with $y>1$?

number-theory diophantine-equations

feb 20 '12 at 15:33 Byron Schmuland 15.4k

2

3

votes

1

answer

534

views

(Inductive Proofs) Show why one inductive hypothesis works, and the other does not.

discrete-mathematics induction

apr 6 '12 at 23:20 Brian M. Scott 154k

3

14

votes

3

answers

462

views

$x,y$ are integers satisfying $2x^2-1=y^{15}$, show that $5 \mid x$

number-theory diophantine-equations

feb 9 '12 at 21:32 BenjaLim 16.7k

5

9

votes

2

answers

458

views

Group theory intricate problem

group-theory contest-math

jun 27 '11 at 19:13 AlbertH 3,542

3

11

votes

2

answers

435

views

avoiding calculus

calculus

sep 25 at 3:07 Gerry Myerson 85.7k

3

7

votes

6

answers

417

views

Calculating $e$

sequences-and-series

nov 10 at 7:22 Dan Brumleve 5,123

3

6

votes

2

answers

401

views

Ash's construction of the Lebesgue-Stieltjes Measure from a distribution function

measure-theory

mar 11 at 17:36 Community♦ 1

3

6

votes

4

answers

393

views

Solve $x^3 +1 = 2y^3$

number-theory diophantine-equations

jan 17 at 22:55 user55514 292

3

4

votes

3

answers

392

views

Fractional part of $b \log a$

number-theory

feb 9 '12 at 21:09 Byron Schmuland 15.4k

1

2

votes

1

answer

375

views

Two group theory questions

abstract-algebra group-theory

mar 13 '12 at 16:08 Arturo Magidin 158k

4

7

votes

1

answer

342

views

Bulgarian Solitaire: Size of root loops

number-theory card-games

jun 10 '11 at 2:54 El'endia Starman 1,783

2

6

votes

1

answer

340

views

Game theory problem: Poker with bluffing

recreational-mathematics game-theory poker

feb 26 at 20:07 Hagen von Eitzen 41.8k

4

14

votes

2

answers

333

views

Solutions of $q=\frac{x}{y} +\frac{y}{z} + \frac{z}{x}$ s.t. $q \geq 3$

number-theory diophantine-equations rational-numbers

feb 29 '12 at 5:02 pedja 6,813

3

7

votes

4

answers

316

views

What would happen if ZFC were found to be inconsistent?

set-theory philosophy

nov 30 at 0:05 Haskell Curry 11.1k

1

vote

0

answers

299

views

Set of segments a vertical ray intersects

algorithms computational-geometry

jan 22 '11 at 14:39 Chao Xu 1,909

2

0

votes

4

answers

286

views

Can you help me solve these questions related to a Logical theory?

homework puzzle intersection data-analysis pigeonhole-principle

dec 31 at 16:09 miracle173 840

1

6

votes

1

answer

282

views

On the equation $(a^2+1)(b^2+1)=c^2+1$

number-theory diophantine-equations

jul 18 '11 at 3:53 Gerry Myerson 85.7k

5

6

votes

4

answers

236

views

How many ways can we place these ships on this board?

combinatorics recreational-mathematics

jan 8 '12 at 15:20 mode 172

2

10

votes

5

answers

231

views

What is the coefficient of the $x^3$ term in the expansion of $(x^2+x-5)^7$ (See details)?

combinatorics algebra-precalculus multinomial-coefficients

sep 24 at 11:47 Willie Wong♦ 30.6k

1

vote

2

answers

225

views

How do I factor a polynomial function with a degree higher than 2 without guessing numbers of $\frac{p}{q}$?

algebra-precalculus functions polynomials factoring

mar 28 '12 at 1:05 Peter Tamaroff 25.4k

2

5

votes

1

answer

167

views

A question about the solutions of $y^2 = x^3 - 4$ for $(x,y) \in \mathbf Z^2$

number-theory diophantine-equations

nov 17 '11 at 8:44 J. M. 38.9k

miracle173

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