Here are a couple examples, plus many other negations; it works for many of the many others as well. This is a bug as far as we know. Depending on the version of this is not always a problem.
Symbolic logic is the method of representing logical expressions through the use of symbols and variables, rather than in ordinary language. This has the benefit of removing the ambiguity that normally accompanies ordinary languages, such as English, and allows easier operation. There are many systems of symbolic logic, such as classical propositional logic, first-order logic and modal logic.
On the main Isabelle page: Documentation. Yes, on the main Isabelle page: Download and installation. Roughly speaking, meta level implication should be used to separate the assumptions from the conclusion in rule statements.
April 13, by Truong Nghiem. One common composition in typesetting mathematical formulas in LaTeX is stacking mathematical symbols, sometimes quite long, over an arrow. Standard LaTeX provides several commands for this purpose, however sometimes they do not satisfy our need, especially when we typeset long arrows.
In scientific texts the visual form of a symbol often implies a semantic meaning which is not easily captured by generic markup. Therefore authors using a generic coding system such as LaTeX or an XML grammar need to know about these typographical conventions. The following is a brief summary of the most important rules for composing scientific texts.
You can add mathematical expressions and equations as floating objects on a slide. To add an equation, you compose it in the Keynote equation dialog using LaTeX commands or MathML elements, then insert it into your presentation. You can also add equations inline with the text inside text boxes and shapes.
Press Alt with the appropriate letter. After pasting, you may need to choose the right font in your target application to see all the symbols. This page allows you to easily type mathematical and scientific symbols available in Unicode. You can edit your text in the box and then copy it to your document, e-mail message, etc.