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Mathematics
Faizal Ismaeel's user avatar
Faizal Ismaeel's user avatar
Faizal Ismaeel's user avatar
Faizal Ismaeel
  • Member for 9 years, 10 months
  • Last seen more than 5 years ago
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I write code for mission critical applications.

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7
Difficulty understanding why $ P \implies Q$ is equivalent to P only if Q.
Oct 5, 2014
5
Number of permutations of thet set $\{1,2,...,n\}$ in which $k$ is never followed immediately by $k+1$
Sep 30, 2014
4
Number of ways to choose a pair $\{a,b\}$ of distinct numbers from the set $\{1,2,...,50\}$
Sep 29, 2014
4
Number of ways to get a total of 14 when tossing a die 3 times
Nov 22, 2014
3
Combinations of $6$-digit natural numbers
Sep 20, 2014
3
Getting $(1-3x^6 + 3x^{12} - x^{18}) \sum_{i=0}^{\infty} \binom{i+2}{2} x^{i}$ from $(\frac{1-x^{6}}{1-x})^3$ using generating functions
Nov 6, 2014
3
Show that $\sum_{i=1}^{r} i^2 = \binom{r+1}{3} + \binom{r+2}{3}$ by finding generating function
Nov 23, 2014
2
Numbers fulfilling a certain condition in a range of numbers
Sep 25, 2014
2
Number of derangements where first m numbers are fixed points
Sep 26, 2014
2
Number of spanning trees of this graph
Nov 10, 2014
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7
Bubble sort in Ruby