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General Q&A about all branches of theoretical and applied mathematics, including closely-adjacent sciences where the central question is about the math.

367 posts RSS
Activity Age Score Random
Filters (None)
33%
+0 −2
What story and two-digit Natural Numbers best fit Bayes' Theorem chart?

0 answers  ·  posted 3y ago by DNB‭  ·  reopened 3y ago by Monica Cellio‭

probability
50%
+1 −1
How can Abraham Wald's approach lead you to ignore crucial features of a problem?

1 answer  ·  posted 3y ago by Chgg Clou‭  ·  last activity 3y ago by JRN‭

intuition
62%
+3 −1
Why are you permitted to define $1 − 1 + 1 − 1 + . . .$?

1 answer  ·  posted 3y ago by Chgg Clou‭  ·  last activity 3y ago by JRN‭

number-theory
66%
+2 −0
How to visualize division as splitting Dividend into B equal “partial groups”, then rounding up A partial groups to get a full group?

1 answer  ·  posted 4y ago by Chgg Clou‭  ·  last activity 3y ago by leovt‭

visualization
60%
+1 −0
How does Pr(an event next year) $= 1/100$ imply Pr(at least one of these events occurring in the next 25 years) $> 1/5$?

1 answer  ·  posted 3y ago by Chgg Clou‭  ·  last activity 3y ago by Nat‭

probability
50%
+0 −0
How's the outcome of airplane crashes almost always certain, but the probability is not? [closed]

0 answers  ·  posted 3y ago by Chgg Clou‭  ·  edited 3y ago by Chgg Clou‭

probability
50%
+0 −0
Why isn't $\Pr(diseased|+ test) = \dfrac{\text{number of true positives}}{\text{number of false positives}}$?

0 answers  ·  posted 3y ago by Chgg Clou‭  ·  edited 3y ago by Chgg Clou‭

probability
50%
+0 −0
Why paradoxical to accept \$3, and avoid betting on Dushanbe's temperature for a prize of \$10?

0 answers  ·  posted 3y ago by Chgg Clou‭  ·  edited 3y ago by thelast19digitsofpi‭

probability
40%
+0 −1
What does "individuals discount the future in a constant manner" mean?

0 answers  ·  posted 3y ago by Chgg Clou‭

probability
37%
+1 −3
If money's less valuable in the two-bullet case of the Russian Roulette problem, then ought you pay more to remove a bullet when the gun has $\ge 2$ bullets?

0 answers  ·  posted 3y ago by Chgg Clou‭

probability
33%
+0 −2
Why should the near-zero prior probability, of 9/11/2001 attacks on the World Trade Centre, overwhelm any subsequent response that may have lowered the objective risk?

0 answers  ·  posted 3y ago by Chgg Clou‭  ·  edited 3y ago by Chgg Clou‭

probability
33%
+0 −2
Why's the unique sub-game perfect equilibrium, that the first player should offer around $1.25 to player 2?

0 answers  ·  posted 3y ago by Chgg Clou‭

game-theory
33%
+0 −2
De-mystifying tricks – If $\{x_n\}$ converges, then Cesaro Mean converges.

1 answer  ·  posted 3y ago by TextKit‭  ·  last activity 3y ago by thelast19digitsofpi‭

analysis
42%
+1 −2
How can I visualize $\lim\limits_{x \rightarrow \pm \infty} f(x) = \lim\limits_{t \rightarrow 0^{\pm}} f(1/t)$?

1 answer  ·  posted 4y ago by TextKit‭  ·  last activity 3y ago by thelast19digitsofpi‭

visualization
50%
+0 −0
How to quantify "married people are less likely than the average person to smoke", "smokers are less likely than the average person to be married"?

1 answer  ·  posted 3y ago by Chgg Clou‭  ·  last activity 3y ago by thelast19digitsofpi‭

probability
50%
+0 −0
What was Justice Scalia's mathematical mistake in Penry v. Lynaugh (1989)?

1 answer  ·  posted 3y ago by Chgg Clou‭  ·  last activity 3y ago by Derek Elkins‭

probability
50%
+0 −0
Why mustn't the proportion of smokers among married people be the same as the proportion of smokers in the whole population?

1 answer  ·  posted 3y ago by Chgg Clou‭  ·  last activity 3y ago by r~~‭

probability
50%
+0 −0
How to intuit : married smokers × all people < all smokers × all married people ?

0 answers  ·  posted 3y ago by Chgg Clou‭

probability
40%
+0 −1
Why do 3D mental pictures usually suffice for high-dimensional geometry?

0 answers  ·  posted 3y ago by Chgg Clou‭  ·  edited 3y ago by Chgg Clou‭

geometry
33%
+0 −2
How can you foretell if a problem is one whose solution admits a simple mathematical description?

0 answers  ·  posted 3y ago by Chgg Clou‭

geometry
50%
+1 −1
Why can an easily graphable definite integral, be labyrinthine to evaluate?

0 answers  ·  posted 3y ago by TextKit‭  ·  edited 3y ago by TextKit‭

calculus
40%
+0 −1
Notation for Euclidean Norm

1 answer  ·  posted 3y ago by Guilherme Costa‭  ·  last activity 3y ago by tommi‭

notation
80%
+6 −0
How to show if a set is simply connected?

1 answer  ·  posted 3y ago by kreijstal‭  ·  last activity 3y ago by Derek Elkins‭

complex-analysis
60%
+1 −0
proving relative lengths on a secant

1 answer  ·  posted 3y ago by msh210‭  ·  last activity 3y ago by Peter Taylor‭

euclidean-geometry
57%
+2 −1
difference between quotient rule and product rule

3 answers  ·  posted 3y ago by deleted user  ·  last activity 3y ago by msh210‭

calculus quotient-rule product-rule
18%
+0 −7
Why is -1 needed to get 65,535 from a 2^16 binary power calculation?

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by Canina‭

computability power binary
75%
+4 −0
Is this topology basis dependent?

1 answer  ·  posted 4y ago by celtschk‭  ·  last activity 3y ago by Incnis Mrsi‭

topology linear-algebra topological-vector-spaces
75%
+4 −0
Intuitively, why's X% of Y = Y% of X?

1 answer  ·  posted 3y ago by Chgg Clou‭  ·  last activity 3y ago by celtschk‭

percentage
66%
+2 −0
Why aren't $z_1=f(xy)$ and $z_2=f(x/y)$ functions of 2 variables?

1 answer  ·  posted 3y ago by TextKit‭  ·  last activity 3y ago by celtschk‭

calculus
50%
+2 −2
What kind of logic does “Logic in the Theory and Practice of Lawmaking” employ?

0 answers  ·  posted 3y ago by Chgg Clou‭

logic
44%
+2 −3
Approximation of an elliptic integral

0 answers  ·  posted 3y ago by theabbie‭

calculus
57%
+2 −1
If $n = xm$ and $n \rightarrow \infty$, then $m \rightarrow \infty$?

1 answer  ·  posted 4y ago by TextKit‭  ·  last activity 3y ago by The Amplitwist‭

calculus
80%
+6 −0
Does every divergence-free vector field arise as the curl of some vector field?

1 answer  ·  posted 4y ago by The Amplitwist‭  ·  last activity 3y ago by Derek Elkins‭

geometry multivariable-calculus derivatives
50%
+0 −0
How can I visualize this Compound Interest Chart with indefinite integrals?

1 answer  ·  posted 4y ago by Chgg Clou‭  ·  last activity 4y ago by r~~‭

visualization
50%
+0 −0
How can I visualize dividing by a fraction as partial and full groups?

0 answers  ·  posted 4y ago by Chgg Clou‭

visualization
62%
+3 −1
Why should a non-commutative operation even be called "multiplication"?

2 answers  ·  posted 4y ago by theabbie‭  ·  last activity 4y ago by celtschk‭

definition notation abstract-algebra
37%
+1 −3
How can I generalize a picture for the Mean Value Theorem to the Generalized MVT?

1 answer  ·  posted 4y ago by TextKit‭  ·  edited 4y ago by TextKit‭

calculus visualization
66%
+2 −0
In a SARIMA model, does the order in which I difference the time series matter?

0 answers  ·  posted 4y ago by anoldmaninthesea‭

statistics
50%
+2 −2
What story and one-digit Natural Numbers explain Bayes' Theorem chart most simply?

0 answers  ·  posted 4y ago by DNB‭  ·  edited 4y ago by Moshi‭

probability
83%
+8 −0
Classification of topological points

1 answer  ·  posted 4y ago by celtschk‭  ·  last activity 4y ago by Technically Natural‭

topology
71%
+3 −0
Isn't it wrong to write that Indefinite Integral = Definite Integral with a variable in its Upper Limit?

2 answers  ·  posted 4y ago by TextKit‭  ·  edited 4y ago by The Amplitwist‭

calculus
83%
+8 −0
Are there useful topologies on Cartesian products “in between” the product topology and the box topology?

0 answers  ·  posted 4y ago by celtschk‭  ·  edited 4y ago by celtschk‭

topology
71%
+3 −0
Cutting the square

0 answers  ·  posted 4y ago by Grove‭  ·  edited 4y ago by Grove‭

geometry
71%
+3 −0
Why does this definition of generalized forces work?

1 answer  ·  posted 4y ago by Technically Natural‭  ·  last activity 4y ago by Derek Elkins‭

differential-geometry lagrangian-mechanics classical-mechanics physics
80%
+6 −0
What surface do I get by attaching $g$ handles as well as $k$ crosscaps to a sphere?

1 answer  ·  posted 4y ago by The Amplitwist‭  ·  last activity 4y ago by msh210‭

geometry topology compactness connectedness sphere
75%
+4 −0
In $P(X\leq q)$, what do we call $q$?

1 answer  ·  posted 4y ago by anoldmaninthesea‭  ·  last activity 4y ago by gramps‭

probability
81%
+7 −0
Are 3 10% chances better than one 30% chance (when penalized by a variable for failures)?

3 answers  ·  posted 4y ago by dustytrash‭  ·  last activity 4y ago by Grove‭

logic basic odds
77%
+5 −0
Normal in one base and not in another?

0 answers  ·  posted 4y ago by Grove‭

number-theory normal bases
75%
+4 −0
Given a triangle with squares on two sides, the line segments joining the centres of the squares to the midpoint of the third side are equal and perpendicular

1 answer  ·  posted 4y ago by The Amplitwist‭  ·  edited 4y ago by ArtOfCode‭

geometry complex-analysis
80%
+6 −0
Why always rationalize a denominator?

3 answers  ·  posted 4y ago by msh210‭  ·  last activity 4y ago by Derek Elkins‭

high-school-mathematics
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