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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.

336 posts   RSS
Activity Age Score Random
Filters (None)
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
60%
+1 −0
What does upper indices represent?

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

notation tensors
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
60%
+1 −0
If a matrix has lots of values in a column but, not in row than, what that actually called?

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by 4015.alt‭

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

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

topology
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
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
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
33%
+0 −2
For (a variation) of the Monty Hall problem, what permits you to repaint doors 2 and 3? What permits you to replace p with $1 - p$?

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
57%
+2 −1
Equation of a line given some parametrized points on it and an area

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

high-school-mathematics coordinate-geometry
77%
+5 −0
Can we adapt Furstenberg's proof of the infinitude of primes to other interesting subsets of the integers?

0 answers  ·  posted 3y ago by HDE 226868‭  ·  edited 3y ago by msh210‭

number-theory topology
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
50%
+1 −1
In general, does $\color{forestgreen}{P(A|M)} + \color{red}{P(B|M)} = 1$?

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

probability
80%
+6 −0
The probability distribution of rolling $n$ dice and keeping $k$ highest

1 answer  ·  posted 3y ago by tommi‭  ·  last activity 3y ago by Peter Cooper Jr.‭

probability dice
25%
+0 −4
Why "only 1/10,000 men with wives they abuse subsequently murder them" ≠ P(A|G,M) & "50% of husbands who murder their wives abused them” ≠ P(G|A)?

0 answers  ·  posted 2y ago by DNB‭

probability
60%
+1 −0
Prove $(\cos^3\theta+\sin^3\theta)^2= \cos^6\theta(1+\tan^3\theta)^2$

2 answers  ·  posted 2y ago by deleted user  ·  last activity 2y ago by Peter Taylor‭

trigonometry
50%
+0 −0
A formal-logic formula for decimal to binary conversion

3 answers  ·  posted 3y ago by deleted user  ·  last activity 3y ago by r~~‭

bases conversion
83%
+8 −0
Classification of topological points

1 answer  ·  posted 3y ago by celtschk‭  ·  last activity 3y ago by Technically Natural‭

topology
60%
+1 −0
Find the intervals on which it is increasing and those on which it is decreasing of the following function.

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

calculus derivatives real-analysis functions maxima-minima
50%
+0 −0
If Alice must've have classes on at least 2 days, why do you need the intersection of 3 $A_i^C$'s? [closed]

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

probability
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
71%
+3 −0
Including Association Analysis results into existing Classification Model

0 answers  ·  posted 3y ago by Guilherme Costa‭

classification association-rules
33%
+2 −6
Can we add without using addition?

3 answers  ·  posted 2y ago by General Sebast1an‭  ·  last activity 2y ago by DavidCary‭

equation arithmetic
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%
+0 −0
"A occurred" vs. "something must happen"

1 answer  ·  posted 3y ago by DNB‭  ·  edited 3y ago by DNB‭

probability
77%
+5 −0
Which of the multiple definitions of correlation to use?

0 answers  ·  posted 3y ago by Mithrandir24601‭  ·  last activity 3y ago by r~~‭

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

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

logic basic odds
57%
+2 −1
Why rational to be indifferent between two urns, when urn A has 50-50 red and white balls, but you don't know urn B's ratio?

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

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
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
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
66%
+2 −0
$\sum_{k=0}^{n} \binom{n}{k}=2^{n} \overset{?}{\iff} \sum_{k=0}^{n} \binom{2n+1}{k}=2^{2n}$

1 answer  ·  posted 3y ago by DNB‭  ·  edited 3y ago by DNB‭

combinatorics
33%
+0 −2
If k = 1, why $n(n-1) \dots \color{red}{(n-k+1)} = n$?

1 answer  ·  posted 3y ago by DNB‭  ·  edited 3y ago by DNB‭

probability
28%
+0 −3
Intuitively, if you pick k out of n objects singly without replacement, why's the number of possible outcomes NOT $n(n-1) \dots [(n-(k - 1)]\color{red}{(n - k)}$?

1 answer  ·  posted 3y ago by DNB‭  ·  edited 2y ago by DNB‭

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%
+2 −2
How can I intuit $\dfrac{a - b}{c - d} \equiv \dfrac{{\color{red}{-}}(b - a)}{{\color{red}{-}}(d - c)} \equiv \dfrac{b - a}{d - c}$?

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

intuition
75%
+4 −0
Is this topology basis dependent?

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

topology linear-algebra topological-vector-spaces
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
Scalar that varies across one or multiple scalar axes

0 answers  ·  posted 2y ago by deleted user

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

0 answers  ·  posted 3y ago by anoldmaninthesea‭

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

0 answers  ·  posted 3y ago by theabbie‭

calculus
28%
+0 −3
Without calculations, how can you visualize "that half the squares are white and half are black"?

1 answer  ·  posted 3y ago by DNB‭  ·  last activity 2y ago by whybecause‭

probability
50%
+1 −1
Rules of checking differentiability for Rolle's theorem

0 answers  ·  posted 3y ago by deleted user  ·  edited 3y ago by deleted user

calculus real-analysis limits differentiability rolle's-theorem
80%
+6 −0
Computational hardness of the uniform halting problem

1 answer  ·  posted 3y ago by user53100‭  ·  last activity 3y ago by Derek Elkins‭

computability oracle-turing-machine arithmetical-hierarchy
37%
+1 −3
What's wrong with evaluating $n(n-1) \dots (n-[k-3])(n-[k-2])\color{red}{(n-[k-1])}$ at $k = 1$?

1 answer  ·  posted 2y ago by DNB‭  ·  edited 1y ago by Peter Taylor‭

notation
30%
+1 −5
In "if and only if" proofs, why's 1 direction easier to prove than the other?

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

logic
50%
+0 −0
Consider the second of these integrals (What's the meaning of second right here?)

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

differentiation integration differentiation-under-integral
71%
+3 −0
Method to calculate the area of a cyclic n-gon

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

geometry polygon area
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