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awarded  Nice Answer
Aug
24
awarded  Popular Question
Aug
22
comment Missing steps: Show the sum of the first n positive integers is of order $n^2$
@tomi No such assumption is needed. $[n/2]$ means the integer part of $\frac n2$.
Aug
22
comment product of spaces is a manifold. Are the spaces?
Related: Simpler version of dogbone space construction
Aug
21
asked Simpler version of dogbone space construction
Aug
21
revised How to convert a decimal to a fraction easily?
added 155 characters in body
Aug
21
awarded  Nice Answer
Aug
21
revised How to convert a decimal to a fraction easily?
deleted 9 characters in body
Aug
21
revised How to convert a decimal to a fraction easily?
added 221 characters in body
Aug
21
answered How to convert a decimal to a fraction easily?
Aug
20
comment How to convert a decimal to a fraction easily?
There are obviously no 2s nor 5s in the prime factorization of 3760683761.
Aug
18
comment 'normally distributed random numbers' vs 'uniformly distributed random number'?
@marco If you roll even as few as 2 dice and average them, the result is not uniformly distributed. The result is twice as likely to be 3.5 as it is to be 2.
Aug
18
comment Strassen's Algorithm for matrix multiplication
@peter Strassen's algorithm is well-known, and the many people who can answer this question will not need the reminder.
Aug
18
revised Identity element of word addition
added 18 characters in body; edited tags
Aug
16
revised Help finding the limit of this series $\frac{1}{4} + \frac{1}{8} + \frac{1}{16} + \frac{1}{32} + \cdots$
deleted 17 characters in body
Aug
11
revised combinations of 5 groups question
edited tags
Aug
11
comment What do you call an object that can have duplicate elements?
In computer science it is often called a bag
Aug
10
comment Last digit of a perfect square must be $0, 1, 4, 5, 6,$ or $9$
The unit place of $x^2$ depends only on the unit place of $x$. How many cases are there for the unit place of $x$?
Aug
10
comment Is “smarter than” a transitive relationship?
Yes, but I wanted smarter people to have larger numbers than less smart people, instead of smaller numbers.
Aug
10
awarded  Announcer