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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.

333 posts   RSS
Activity Age Score Random
Filters (None)
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
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
How to intuit : married smokers × all people < all smokers × all married people ?

0 answers  ·  posted 3y ago by Chgg Clou‭

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

0 answers  ·  posted 3y ago by DNB‭  ·  edited 3y ago by Moshi‭

probability
50%
+0 −0
How can I visualize this Compound Interest Chart with indefinite integrals?

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

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

0 answers  ·  posted 3y ago by Chgg Clou‭

visualization
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
Intuitively, what does the 1 mean in $\dfrac{a}{b} = \dfrac{1}{\frac{b}{a}}$?

2 answers  ·  posted 3y ago by Chgg Clou‭  ·  last activity 3y ago by nalply‭

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

0 answers  ·  posted 3y ago by theabbie‭

calculus
44%
+2 −3
Cyclical or “loop” fractals?

1 answer  ·  posted 2mo ago by Julius H.‭  ·  last activity 2mo ago by r~~‭

real-analysis fractal
44%
+2 −3
How to compare lotteries, when one has highest probability of winning the jackpot, but another the highest Expected Value?

1 answer  ·  posted 11mo ago by Chgg Clou‭  ·  last activity 11mo ago by tommi‭

lottery
42%
+1 −2
1 picture proof for the triangle inequality and the reverse triangle inequality

0 answers  ·  posted 8mo ago by Este‭  ·  edited 8mo ago by trichoplax‭

visualization
42%
+1 −2
What is the significance of the K-axiom in modal logic S5?

1 answer  ·  posted 2mo ago by Julius H.‭  ·  edited 8d ago by xamidi‭

modal-logic proof-theory hilbert-systems axioms
42%
+1 −2
How to intuit P(win the same lottery twice) $= p^{2}$ vs. P(win the same lottery twice | you won the lottery once) $= p$?

2 answers  ·  posted 12mo ago by Chgg Clou‭  ·  edited 12mo ago by Chgg Clou‭

lottery
42%
+1 −2
Picture proof for expansion of $x^n−y^n$

2 answers  ·  posted 8mo ago by Este‭  ·  last activity 8mo ago by Peter Taylor‭

visualization
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 3y ago by TextKit‭  ·  last activity 3y ago by thelast19digitsofpi‭

visualization
42%
+1 −2
In $w_{k + 1} - w_k = (\frac{1 - p}{p})^{exponent}(w_1 - w_0)$, why isn't exponent $k + 1$?

1 answer  ·  posted 2y ago by DNB‭  ·  last activity 2y ago by leovt‭

probability
42%
+1 −2
How do mathematicians measure shape perimeters?

2 answers  ·  posted 2y ago by deleted user  ·  edited 2y ago by deleted user

geometry
42%
+1 −2
How to determine area of square using Calculus in Cartesian coodinate?

3 answers  ·  posted 2y ago by deleted user  ·  last activity 2y ago by celtschk‭

calculus integration
42%
+1 −2
Intuitively, why would organisms — that after one minute, will either die, split into two, or stay the same, with equal probability — all die ultimately?

1 answer  ·  posted 2y ago by DNB‭  ·  last activity 2y ago by Peter Taylor‭

probability
42%
+1 −2
Is $r \times \frac{d}{dt} mv=\frac{d}{dt} (r \times mv)$

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by JRN‭

differentiation
40%
+0 −1
If A & B are joint, can Arby recoup some of his loss only when $P_{Arby}(A \cup B) < P_{Arby}(A) + P_{Arby}(B)$?

0 answers  ·  posted 3y ago by DNB‭  ·  edited 2y ago by DNB‭

probability
40%
+0 −1
How to visualize multiplication in the Odds form of Bayes's Theorem?

0 answers  ·  posted 2y ago by DNB‭  ·  edited 2y ago by DNB‭

probability
40%
+0 −1
How would you vaticinate to $-w_k$ from both sides of $w_{k + 1} = \dfrac{w_k - (1 - p)w_{k - 1}}{p}$?

1 answer  ·  posted 2y ago by DNB‭  ·  last activity 2y ago by Giannis‭

probability
40%
+0 −1
How to vaticinate calculating $w_{k + 1} = w_1(1 + \dfrac{1- p}{p} + \dots + [\dfrac{1- p}{p}]^k)$ separately for $p = 1 - p$ and $p \neq 1 - p$?

0 answers  ·  posted 2y ago by DNB‭  ·  edited 2y ago by DNB‭

probability
40%
+0 −1
Scalar that varies across one or multiple scalar axes

0 answers  ·  posted 2y ago by deleted user

scalar
40%
+0 −1
How to find constant equal to what in integration?

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by deleted user

classical-mechanics integration
40%
+0 −1
How to visualize division in the Odds form of Bayes's Theorem?

0 answers  ·  posted 2y ago by DNB‭  ·  edited 2y ago by DNB‭

probability
40%
+0 −1
What to do when there's lot of function of time? (For integration) Should I consider them as constant?

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by r~~‭

integration
40%
+0 −1
What is the meaning of integration under integral sign?

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by deleted user

calculus integration
40%
+0 −1
$\int dx dy dz d p_x dp_y dp_z$ Does it have any physical meaning?

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by r~~‭

integration line-integral integral
40%
+0 −1
How do you calculate $P(X = n|G), P(X = n|G^C)$ by the Law of Total Probability, with extra conditioning?

0 answers  ·  posted 2y ago by DNB‭  ·  edited 2y ago by Wolgwang‭

probability
40%
+0 −1
While pictorializing $|x - y| < |x + y|$, how can 1 picture simultaneously prove (Reverse) △ Inequalities, $|x-y| ≤ |x|+|y|, |x|-|y| ≤ |x-y|$? [duplicate]

0 answers  ·  posted 7mo ago by Tortilla‭  ·  closed as duplicate 7mo ago by Peter Taylor‭

visualization
40%
+0 −1
What is a one-variable fragment of first-order logic?

0 answers  ·  posted 2mo ago by Julius H.‭

logic
40%
+0 −1
If C = Calvin wins the match, and $X \thicksim Bin(2, p) =$ how many of the first 2 games he wins — then why P(C|X = 1) = P(C)?

1 answer  ·  posted 2y ago by DNB‭  ·  last activity 2y ago by Peter Taylor‭

probability
40%
+0 −1
Can the bijection for the Lost Boarding Pass Probability Problem, be formulated or pictured?

1 answer  ·  posted 2y ago by DNB‭  ·  last activity 2y ago by r~~‭

combinatorics
40%
+0 −1
How can a 15 year old construe the LHS of Generalized Vandermonde's Identity, when it lacks summation limits and a summation index?

2 answers  ·  posted 2y ago by DNB‭  ·  last activity 2y ago by r~~‭

summation
40%
+0 −1
To correct for overcounting, why can't we divide by the sum of the over-counts? [duplicate]

0 answers  ·  posted 2y ago by DNB‭  ·  closed as duplicate 2y ago by Peter Taylor‭

combinatorics
40%
+0 −1
Why must percent change divide the difference by the old, NOT new, value?

1 answer  ·  posted 2y ago by Chgg Clou‭  ·  last activity 2y ago by celtschk‭

percentage
40%
+0 −1
Why's a 2-player game with "win by two" rule = Gambler's Ruin where each player starts with $2? Why N = 4?

0 answers  ·  posted 2y ago by DNB‭  ·  edited 2y ago by DNB‭

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
40%
+0 −1
Notation for Euclidean Norm

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

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

0 answers  ·  posted 3y ago by Chgg Clou‭

probability
40%
+0 −1
Existence of a set of all sets

2 answers  ·  posted 3y ago by MathPhysics‭  ·  last activity 3y ago by Derek Elkins‭

set-theory
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