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2h
comment Non-existence Tracial states
Kind of relevant: ams.org/journals/proc/2000-128-12/S0002-9939-00-05605-7/…
4h
revised How to calculate multiplication of probabilities when range is given?
added 790 characters in body
4h
answered How to calculate multiplication of probabilities when range is given?
Jul
3
comment A question in interview for trinity college, Cambridge
It is $\log M=\log_e M=\ln M$.
Jul
3
comment Is 'a' differentiable in f when f is a product of a differentiable and non-differentiable function?
$F(x)=x|x|$ is a good example in this context.
Jul
3
comment Is 'a' differentiable in f when f is a product of a differentiable and non-differentiable function?
How does $F(x)=x|x|$ fit into your first framework??
Jun
29
accepted The 1-Norm on a Quantum Group as a Supremum
Jun
28
revised The 1-Norm on a Quantum Group as a Supremum
edited title
Jun
28
asked The 1-Norm on a Quantum Group as a Supremum
Jun
26
answered does this theorem imply that every $C^*$-algebra has an approximate unit?
Jun
26
comment Significant figures reduction of solution
No. Three significant figures would be 303.
Jun
26
comment Significant figures reduction of solution
...or just 300.
Jun
25
comment The Irreducible Corepresentations of the eight-dimensional Kac-Paljutkin Quantum Group
I have since found an explicit answer to this question. The matrix elements of these five corepresentations are on p.147 of books.google.ie/….
Jun
25
comment help with wrong result for $v(x) = \frac{\sqrt[3]{x-1}}{(x+2)^2}$
"solve this"... no: differentiate this. Your notation is poor because you use $f(x)$ for two different things... use $u(x)$ and $v(x)$.
Jun
24
comment proof for $\frac{1}{i} = -i$?
...because inverses in a group are unique.
Jun
23
comment Is the composing of functions always commutative?
@Frans I wasn't the downvoter... you couldn't find a counterexample... why not just try to 'random' functions.
Jun
23
comment GRE Math Subject Test ,Please Check my Plan
math.stackexchange.com/questions/91170/… and search this site for 'books for GRE'.
Jun
22
comment Maximum and minimum of $y = x^4 - 8x^2 + 3$ for $x \in [ -1 , 2 ]$
You can find the local maxima and minima and all that remains is to look at the values at the endpoints.
Jun
17
comment Percentage above 100
Should would be great but do they? Not where I am from do nine-year-olds do algebra. If the parent wants to know how its done surely they want to know in a way that their child would be expected to understand? Regardless is Ethan's answer not more straightforward?
Jun
17
comment Percentage above 100
9 year old... will they understand the concept of $x$?