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JJJohn's user avatar
JJJohn
  • Member for 5 years, 1 month
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4 votes
Accepted

The proof of SVD solver formula, $C^T C = V \Sigma^T \Sigma V^T$

3 votes
Accepted

how to justify $\operatorname{E} [X^2] = \sigma^2 + \mu^2$

1 vote
Accepted

How can I denote a sequence of sets correctly?

1 vote
Accepted

Is this the right equation to compute the likelihood of a normal distribution at a point?

0 votes

Suppose 3 boolean RVs, there should be $2^N = 2^3 = 8$ params, could someone please give a concrete example to enumerate what are they?

0 votes

Is this statement an axiom "The probability that a continuous variable exactly equals to a given value is zero"?

0 votes
Accepted

What does $2^X$ mean in $2^X:= {\mathcal {P}}(X)$

0 votes

what is the official/academic name of an area under the right-tailed standard normal curve and how to compute the quantity?

0 votes
Accepted

how can i draw a specific space-filling curve mathematically? almost achieve, need a bug fixing.

0 votes
Accepted

how the left side of this formula $\mathbb{E}[Y_i \sum_{j\neq i} Y_j ] = \sum_{j\neq i}\mathbb{E}[Y_i Y_j]$ conduct to the right side?

-1 votes

which rule or definition apply ${\displaystyle {\begin{aligned} \operatorname {E} [Y_{i}^{2}] = (\sigma ^{2}+\mu ^{2}) \quad (3.1) \end{aligned}}}$

-1 votes

"expectation of sum is sum of expectation", is this claim true? if yes, how to justify this claim?