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user523384
  • Member for 6 years, 3 months
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11 votes
4 answers
1k views

Intuitively, $why$ do defective matrices have extra eigenvalues?

5 votes
3 answers
433 views

How do we make the "intuitive calculation" of conditional probability, rigorous?

5 votes
1 answer
142 views

When can we use limits to overcome $0$ probability events like $\{Y=y \}$?

4 votes
1 answer
296 views

"Proof" that $\sqrt{x^2} = x$ by using index laws. Why is this wrong?

4 votes
2 answers
817 views

Why calculate the line integral for a vector field? *Without using work/physics*

3 votes
1 answer
515 views

What is the definition of $X|(Y=y)$?

3 votes
2 answers
281 views

Why is $\lambda$ called the *instantaneous* rate of change in the exponential distribution?

3 votes
3 answers
441 views

Intuition behind $\sin(\theta)$ when introducing this to high school students

2 votes
0 answers
81 views

Intuition behind odds/equation in Gambler's ruin

2 votes
1 answer
616 views

Does a joint density $ f_{X,Y} $ split uniquely into two marginal PDF's $ f_{X} (x) $ and $f_{Y} (y) $ for independent random variables?

2 votes
1 answer
149 views

Why not define the Lagrangian like this?

2 votes
0 answers
202 views

Expressing Bessel's Function at $\nu = \pm \frac{1}{2} $ using $\sin(z)$ and $\cos(z)$

2 votes
2 answers
118 views

Is there a way to see a connection between Law of Total Probability and Law of Total Expectation?

2 votes
4 answers
782 views

General Linear Group: Thinking of invertible matrices as bijective functions?

1 vote
3 answers
669 views

Finding the size of the smallest subgroup of $\mathrm{GL}(2,\mathbb{R})$ containing two matrices.

1 vote
1 answer
114 views

Prove that $\left\vert\frac{a+b}{1+ab}\right\vert < 1$ given that $|a|<1$ and $|b|<1$

1 vote
1 answer
84 views

When are integration constants parameters for you to choose, and when are they simply unknowns yet fixed?

1 vote
0 answers
314 views

Singular Value Decomposition - Understanding the geometric visualisation

1 vote
2 answers
782 views

Ambiguous Case for Sine rule but non-ambiguous for Cosine rule?

1 vote
1 answer
163 views

Define the path integral when scalar $f$ and curve $\mathbf{c}$ is in *curvilinear* coordinates

1 vote
2 answers
91 views

Proving open set without Cauchy-Schwarz or Preimage

1 vote
0 answers
55 views

Circular working out with partial derivatives

1 vote
2 answers
113 views

Finding the joint distribution of two dependent random variables given conditions

1 vote
1 answer
336 views

Intuitively, *why* is the joint density function zero when the joint cumulative function is constant/single variable?

1 vote
0 answers
43 views

Confirming the basic motivation for a sigma algebra (for probability)

1 vote
2 answers
39 views

Can you see clearly _why_ $x$ and $h$ are linearly related in a triangle?

1 vote
1 answer
257 views

Using the remainder theorem to prove a quadratic is a factor of a polynomial

1 vote
1 answer
96 views

Why is probability divided by time = annual rate? (Force of Mortality)

0 votes
1 answer
77 views

Conditional Probability for mutually exclusive events - What is the probability $P(X_j = 1 \ \vert \ \text{Only one of } X_i=1)$

0 votes
0 answers
52 views

Why is the number of heads and the number of tails independent in $n$ coin flips?