Mathematics

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 1y ago by DNB‭ · edited 1y ago by DNB‭

probability

33%

+0 −2

Intuitively, why can $a, b$ cycle in ${\color{red}{b}} = \frac c{\color{red}{a}} \iff {\color{red}{a}} = \frac c{\color{red}{b}}$?

3 answers · posted 1y ago by Chgg Clou‭ · last activity 1y ago by whybecause‭

arithmetic

75%

+4 −0

$\int_{E_n} |g|^q = \left| \int_E \chi_{E_n}\cdot \text{sgn}(g)\cdot g \cdot |g|^{q-1}\cdot |g| \right|$

0 answers · posted 1y ago by whybecause‭ · edited 1y ago by Derek Elkins‭

real-analysis Lp-space

28%

+0 −3

Without calculations, how can you visualize "that half the squares are white and half are black"?

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

probability

50%

+1 −1

In general, does $\color{forestgreen}{P(A|M)} + \color{red}{P(B|M)} = 1$?

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

probability

50%

+1 −1

Acceptable, usual to write $\ge 2$ pipes simultaneously?

1 answer · posted 1y ago by DNB‭ · last activity 1y ago by Derek Elkins‭

probability

50%

+0 −0

How does $P(C > D \mid C = 2) \neq P(C > D \mid C \neq 2)$ prove that B > C depends on C > D?

0 answers · posted 1y ago by DNB‭ · edited 1y ago by DNB‭

probability

71%

+3 −0

Is Pythagorean theorem really valid in higher dimensional space?

2 answers · posted 1y ago by deleted user · edited 1y ago by zavier‭

pythagoras right-triangle

33%

+0 −2

Is Mathematical Induction truly "induction", or misnamed? [closed]

3 answers · posted 1y ago by Chgg Clou‭ · closed 1y ago by Peter Taylor‭

induction

33%

+0 −2

How do mathematicians measure area for points?

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

geometry area point border perimeter

40%

+0 −1

Why must percent change divide the difference by the old, NOT new, value?

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

percentage

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 1y ago by 4015.alt‭

linear-algebra matrices

60%

+1 −0

What does upper indices represent?

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

notation tensors

50%

+0 −0

What is the parallel for edges?

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

geometry terminology

33%

+2 −6

Can we add without using addition?

3 answers · posted 1y ago by General Sebast1an‭ · last activity 1y ago by DavidCary‭

equation arithmetic

28%

+0 −3

How can Cross Multiplication be intuited or pictured? [closed]

0 answers · posted 1y ago by Chgg Clou‭ · edited 1y ago by Chgg Clou‭

arithmetic

20%

+0 −6

Without trial and error, average(average(a,b),c) vs. average(a,average(b,c)). [closed]

0 answers · posted 1y ago by Chgg Clou‭ · edited 1y ago by Chgg Clou‭

arithmetic

57%

+2 −1

Third kind of infinite

1 answer · posted 1y ago by Estela‭ · last activity 1y ago by r~~‭

set-theory

28%

+0 −3

What is topology? When a person should learn it? [closed]

0 answers · posted 1y ago by deleted user · closed 1y ago by Peter Taylor‭

topology soft-question

50%

+0 −0

transpose matrix and general matrix is completely messed up

1 answer · posted 1y ago by deleted user · edited 1y ago by Peter Taylor‭

matrices matrix-transpose

50%

+0 −0

Probability of students given there are groups

0 answers · posted 2y ago by Pranav_M99‭ · edited 1y ago by Peter Taylor‭

probability statistics

40%

+0 −1

Can the bijection for the Lost Boarding Pass Probability Problem, be formulated or pictured?

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

combinatorics

66%

+2 −0

ratio of partial sums of the same geometric sequence

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

geometric-sequence partial-sum

71%

+3 −0

What does the distribution of a strictly increasing random walk look like if you stop at `N` steps?

0 answers · posted 1y ago by SherlockSage‭ · edited 1y ago by SherlockSage‭

combinatorics

81%

+7 −0

Does this construction always give a topological vector space?

0 answers · posted 1y ago by celtschk‭ · edited 1y ago by r~~‭

topology linear-algebra topological-vector-spaces

60%

+1 −0

What it ≡ called?

1 answer · posted 1y ago by Anonymous‭ · last activity 1y ago by Quintec‭

symbols

40%

+0 −1

$\int dx dy dz d p_x dp_y dp_z$ Does it have any physical meaning?

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

integration line-integral integral

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 2y ago by DNB‭ · edited 1y ago by DNB‭

probability

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 2y ago by DNB‭ · edited 1y 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 1y ago by Giannis‭

probability

77%

+5 −0

Getting backward of partial differentiation's chain rule

3 answers · posted 2y ago by deleted user · last activity 1y ago by Derek Elkins‭

multivariable-calculus differentiation chain-rule

33%

+0 −2

Which vertical line signifies "putting the cutoff for a positive result at a very low level"?

0 answers · posted 2y ago by DNB‭ · edited 1y 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 1y ago by deleted user · last activity 1y ago by r~~‭

integration

50%

+0 −0

Consider the second of these integrals (What's the meaning of second right here?)

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

differentiation integration differentiation-under-integral

71%

+3 −0

What're the orders for equation expressing?

2 answers · posted 1y ago by General Sebast1an‭ · last activity 1y ago by r~~‭

exponent equation order grouping arithmetic

33%

+0 −2

Why's the true positive rate termed Sensitivity and true negative rate Specificity, not vice versa? [closed]

0 answers · posted 2y ago by DNB‭ · closed 1y ago by Peter Taylor‭

probability

28%

+0 −3

Why aren't the "21 possibilities here" NOT equally likely?

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

probability

33%

+0 −2

How can I visualize the Law of Total Probability with extra conditioning?

0 answers · posted 2y ago by DNB‭ · edited 1y ago by Wolgwang‭

probability visualization

28%

+0 −3

If a repair on a vessel costs $2$ and fully repaired vessel is worth $1$, don't we need know worth of broken vessel to decide whether to repair?

0 answers · posted 2y ago by Chgg Clou‭ · edited 1y ago by Wolgwang‭

basic

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 1y ago by Wolgwang‭

probability

50%

+1 −1

Why $\color{red}{k\dbinom{k}{1}} \neq$ "first choose the k team members and then choose one of time to be captain"?

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

probability

33%

+0 −2

Does "both girls, ≥ 1 winter girl" = "both girls, ≥ 1 winter child" let you generalize the problem statement that postulated both children as girls?

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

probability

28%

+0 −3

How would you intuit, and soothsay to rewrite, "both girls, ≥ 1 winter girl" as "both girls, ≥ 1 winter child"?

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

probability

28%

+0 −3

How do I prove Simpson's Paradox, scilicet $P(A|B) > P(A|B^C)$?

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

probability

71%

+3 −0

Find limits of integration in polar coordinates

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

calculus double-integrals polar

33%

+0 −2

How does counting E twice explain the discrepancy between the third between C and E, third between E and G v. fifth between C and G?

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

arithmetical-hierarchy

28%

+0 −3

After $n - 2$ unchosen doors are opened, how does the probability of the $n - 2$ unchosen doors "shift" or "transfer" to the lone unchosen door?

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

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

71%

+3 −0

Why would skyrocketing the numbers of doors help laypeople intuit the Monty Hall Problem?

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

probability

28%

+0 −3

Besides guaranteeing 0 ≤ P(A ∩ B) ≤ 1, why can't Independence be defined as P(A ∩ B) = P(A) +,-, or ÷ P(B)?

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

probability

Communities