[Tex/LaTex] Bold dot and plus operator for math

Question

I'm rewriting some math equation in LaTeX, and I came across something like this:

Where apparently there is something like a bullet dot operator, probably used for dot product. It's different than a regular \cdot. But, also the plus is different than a regular plus, it's a bit bolder and smaller. Any ideas how to write them in LaTeX?

Answer 1

For the fat dot you can use \bullet the plus might be \textadvanced or a \textsubplus

For future reference use How to look up a symbol or identify a math symbol or character?

Now if you some day, even through the above question/answer set, cannot find the symbol in any existing LaTeX, you can always draw it yourself. I don't know if this is the proper way to do it, but here's what I came up with:

\documentclass[border=5pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{tikz}

\newcommand{\fatterdot}{\raisebox{0.25ex}{\tikz\filldraw[black,x=2pt,y=2pt] (0,0) circle (1);}}
\newcommand{\fatplus}{\raisebox{0ex}{\tikz\filldraw[black,x=2pt,y=2pt] (0,0) -- ++(1,0) -- ++(0,1) -- ++(1,0) -- ++(0,-1) -- ++(1,0) -- ++(0,-1) -- ++(-1,0) -- ++(0,-1) -- ++(-1,0) -- ++(0,1) -- ++(-1,0) -- cycle;}}
\begin{document}
$\Gamma\fatterdot \Delta' = \Theta \fatplus \theta \fatterdot \beta^T$
\end{document}

Which produces:

As you can see this is much fatter plus's and dots. They are however not nice to use with different fonts and fontsizes.