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Jul
23
answered Notation of the differential operator
Jul
23
comment Notation of the differential operator
\newcommand{\d}{\mathrm{d}}
Jul
23
comment Notation of the differential operator
Writing \text{d} is not a good idea, as the shape and font used then depends on the shape and font surrounding the formula (if that's italic, the d will be italic as well). Use \mathrm{d}.
May
8
awarded  Student
May
8
asked Common term for “present value” and “future value”
Oct
8
awarded  Editor
Oct
8
revised prove that it's not provable
deleted 9 characters in body
Oct
8
comment prove that it's not provable
Sorry, it's several years now that I read about it. Thanks for correcting.
Oct
7
awarded  Teacher
Oct
7
answered prove that it's not provable
Sep
27
answered how to prove, $f$ is onto if $f$ is continuous and satisfying $|f(x) - f(y)| ≥ |x - y|$ for all $x,y$ in $\mathbb{R}$