Various Tikz

Latex and Tikz allows to programmatically create beautiful documents, presentantions and graphics. Their documentation is clear but so extensive that one search the net for quick hacks, most often ending on Stack Exchange. Here’s some of the hints I found useful

KaTeX – The fastest math typesetting library for the web

 KaTeX – The fastest math typesetting library for the web

Type an expression:

See how it renders with KaTeX\KaTeX:
f(x)=∫−∞∞f^(ξ)e2πiξxdξf(x) = \int_{-\infty}^\infty \hat f(\xi)\,e^{2 \pi i \xi x} \,d\xif(x)=f^(ξ)e2πiξxdξ
Simple API, no dependencies – yet super-fast on all major browsers.
Math typesetting on the web seems to have a new king. Thank you for all the fish, MathJax…

TexLive is crippled in Centos 7

Oh, what a joy discovering that TexLive packages in CentOS 7 are bugged or crippled beyond any reasonable amount!

Furthermore TeXlive in distros like CentOS 7 is crippled since they don’t offer the TeXlive Manager called tlmgr. So updating packages is a pain, since it has to be done manually, which is far from being trouble-free — newer versions of LaTeX packages could depend on newer versions of other LaTeX packages and so on and so on.And at last, TeXlive is just a snapshot of CTAN, at least regarding LaTeX packages and lots of other stuff. So having a possibility to update sounds like a very good idea to me.So as conclusion: Just forget the TeXlive packages from CentOS 7. Install the regular TeXlive. [5] As prerequisites you need to install the CentOS packages “perl-Tk” and “perl-Digest-MD5”, afterwards the installation should be pain-free

From: [RESOLVED] missing texlive files in Centos 7? – CentOS

Quite frankly I consider quite a failure to rely on the TexLive specific installer