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Jul
2
answered The image of a basis under an onto linear transformation is a basis
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Jul
2
comment Why do we define functions to be set theoretic objects?
@TonyK Rules are simple enough to accept them without any definition. Much like sets.
Jul
1
comment The defective doyle
What's the difference between a defective doyle and a non-defective doyle?
Jul
1
comment What should I use Latex or Microsoft Word Professional?
I personally find visual equation editors awful. Once you know LaTeX syntax, it's just a total pain in the ass. Hammering away at the arrow keys, guiding your cursor through a maze of fractions and exponents and subscripts to get it to where you want...
Jul
1
comment Why do we define functions to be set theoretic objects?
@TonyK A rule which to each element of $\mathbb R$ associates an element of $\mathbb R$. How would you define a set?
Jul
1
revised Meaning of $f(z,\bar{z})$
added 58 characters in body
Jul
1
answered Meaning of $f(z,\bar{z})$
Jul
1
awarded  Enlightened
Jul
1
awarded  Nice Answer
Jun
30
comment does the series converge? $\sum_{n=1}^\infty\left(\frac {3}{5^n}+\frac 2n\right) $
@Joshhw It's possible we're not talking about the same comparison test. I'm saying that if $\sum b_n$ converges and $0\leq a_n\leq b_n$ for all $n$, then $\sum a_n$ converges.
Jun
30
comment does the series converge? $\sum_{n=1}^\infty\left(\frac {3}{5^n}+\frac 2n\right) $
@Joshhw I'm not sure what you mean by $a_n$. Each term of the series in your question is greater than the corresponding term in the harmonic series. If the terms in one (positive) series are greater than the terms in a divergent (positive) series, then of course the former series diverges too.
Jun
30
answered does the series converge? $\sum_{n=1}^\infty\left(\frac {3}{5^n}+\frac 2n\right) $
Jun
30
answered Number of particular terms in a product
Jun
30
comment Another mid level math question about %.
@helena4 Note that this isn't just some method that happens to work, this is what division is for. The definition of $a/b$ is "what do I need to multiply $b$ by to get $a$".
Jun
30
comment Probability of two cot deaths in one family
Would this be more appropriate for the Statistics SE?
Jun
30
answered Subtraction of a negative number
Jun
27
comment Is $\mathbb{R}^n$ a field?
@AsafKaragila Do you just have a list of what's consistent with what memorized, or do you just know enough set theory to be able to come up with arguments on the fly?
Jun
26
comment Integer values of $\frac{x}{y}+\frac{y}{z}+\frac{z}{x}$?
In other words, when is $x^2z+y^2x+z^2y$ a multiple of $xyz$?