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Mathematics
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yuanqili
  • Member for 9 years
  • Last seen more than 7 years ago
  • Santa Barbara, CA, United States
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8
How many truth tables if there are only $\land$ or $\lor$ for $n$ variables?
Jul 6, 2015
2
How many words are there in a finite context-free grammar in Chomsky normal form?
May 23, 2016
1
When will $A_1^c \Delta A_2^c = (A_1 \Delta A_2)^c$ holds?
Jul 15, 2015
1
How to prove partial ordering formally?
Jul 25, 2015
1
Find expectation, $\mathbb{E}[(X_1Y+X_2)^2|X_1,X_2]$
Feb 12, 2017
0
How to convert a truth table to boolean expression?
Jul 6, 2015
0
Given the size of $\mathscr{U}, A, B$, how many possible combinations of $A$ and $B$ such that $A\cap B \neq \varnothing$?
Jul 17, 2015
0
Show that for any random variable $X$, and any $a > 0$, $P(|X| > a) \leq {EX^4 \over a^4}$.
Jul 27, 2015
0
Find $Z=X+Y$ given $f(x,y) = 2(x+y)$ for $0\leq x \leq y \leq 0$ using transformation method.
Jan 27, 2016
0
Find expectation of $X_1$ given $\sum_{k=1}^n X_k=j$
Feb 20, 2017