t-an­gles – Draw tan­gles, trees, Hopf al­ge­bra op­er­a­tions and other pic­tures

A LaTeX2ε pack­age for draw­ing tan­gles, trees, Hopf al­ge­bra op­er­a­tions and other pic­tures. It is based on emTeX or TPIC \spe­cials. There­fore, it can be used with the most pop­u­lar drivers, in­clud­ing emTeX drivers, dvi­win, xdvi and dvips, and (us­ing some code from ConTeXt) it may also be used with PDFLaTeX.