User Dan - Mathematics Stack Exchange

66 votes

6 answers

22k views

Is $\{0\}$ a field?

asked Jun 22, 2013 at 18:41

24 votes

1 answer

1k views

Bombing of Königsberg problem

asked Jun 12, 2013 at 23:55

6 votes

0 answers

121 views

Is there a closed-form expression for this iterated mean?

asked Apr 3, 2024 at 18:36

5 votes

2 answers

175 views

Approximating pumpkin pi (the ratio of an idealized pumpkin's circumference to its diameter, appropriately defined)

asked Oct 2 at 0:17

3 votes

1 answer

112 views

Why does additive inverse have a unary operator but multiplicative inverse doesn't?

asked Oct 11 at 0:04

3 votes

1 answer

239 views

How much advantage would a Blackjack player gain by being able to see the underside of cards?

asked Feb 13, 2014 at 4:16

2 votes

0 answers

257 views

Derive the Pythagorean Theorem from the Taylor series for trig functions

asked May 24, 2022 at 4:55

2 votes

1 answer

455 views

Does there exist a highly-composite number n > 2520 such that the next HCN is 2n?

asked Feb 23, 2012 at 8:17

1 vote

0 answers

80 views

What's the minimum/maximum value of $f(a, b, c) + f(b, c, a) + f(c, a, b)$ if $a, b, c \ge 0$ and $a + b + c = K$?

asked Feb 14 at 23:21

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9 Questions

Is $\{0\}$ a field?

Bombing of Königsberg problem

Is there a closed-form expression for this iterated mean?

Approximating pumpkin pi (the ratio of an idealized pumpkin's circumference to its diameter, appropriately defined)

Why does additive inverse have a unary operator but multiplicative inverse doesn't?

How much advantage would a Blackjack player gain by being able to see the underside of cards?

Derive the Pythagorean Theorem from the Taylor series for trig functions

Does there exist a highly-composite number n > 2520 such that the next HCN is 2n?

What's the minimum/maximum value of $f(a, b, c) + f(b, c, a) + f(c, a, b)$ if $a, b, c \ge 0$ and $a + b + c = K$?