'→→' (or '⊃⊃') is a symbol belonging to various formal languages (e.g. the language of propositional logic or the language of the first-order predicate calculus) to express [usually, but not always] the truth-functional conditional. A→BA→B is a single conditional proposition...
symbol 11 in Fig. 3); (ii) the ancient cline of haplogroup K can be explained if about 98% of farmers were not involved in cultural diffusion. However, we stress that the observed cline cannot be understood assuming that 100% of farmers were not involved in cultural diffusion. Thus, the...
In a multi-line equations like below, what is the proper mathematical symbol to denote “from the above line it follows that ...”? \documentclass[12pt,oneside]{article} \usepackage{libertine} \usepackage{amsthm} \usepackage[libertine]{newtxmath} \usepackage[T1]{fontenc} \usepackage[utf8]...
This provides \notimplies that sets a relational symbol with \not overlaid \implies (technically, the other way around): \documentclass{article} \usepackage{amsmath}% http://ctan.org/pkg/amsmath \newcommand{\notimplies}{% \mathrel{{\ooalign{\hidewidth$\not\phantom{=}$\hidewidth\cr$\imp...