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propositional logic, Boolean algebra, first-order logic. ⊥ {\displaystyle \bot } denotes a proposition that is always false. The symbol ⊥ may also refer to perpendicular lines. The proposition. ⊥ ∧ P {\displaystyle \bot \wedge P} is always false since at least one of the two is unconditionally false. ∀.
List of proofreader's marks. This article is a list of standard proofreader's marks used to indicate and correct problems in a text. Marks come in two varieties, abbreviations and abstract symbols. These are usually handwritten on the paper containing the text. Symbols are interleaved in the text, while abbreviations may be placed in a margin ...
Miscellaneous Symbols is a Unicode block (U+2600–U+26FF) containing glyphs representing concepts from a variety of categories: astrological, astronomical, chess, dice, musical notation, political symbols, recycling, religious symbols, trigrams, warning signs, and weather, among others.
1 Control-C has typically been used as a "break" or "interrupt" key. 2 Control-D has been used to signal "end of file" for text typed in at the terminal on Unix / Linux systems. Windows, DOS, and older minicomputers used Control-Z for this purpose. 3 Control-G is an artifact of the days when teletypes were in use.
Unicode has subscripted and superscripted versions of a number of characters including a full set of Arabic numerals. [1] These characters allow any polynomial, chemical and certain other equations to be represented in plain text without using any form of markup like HTML or TeX .
Obsolete symbol for voiceless alveolar implosive, Serer Ʈ ʈ 𐞯 T with retroflex hook: Voiceless retroflex plosive; Superscript form is an IPA superscript letter 𝼉 T with hook and retroflex hook: Symbol for voiceless retroflex implosive: ȶ: T with curl: Voiceless alveolo-palatal stop: ᴛ̇: Small capital T with dot above: ᴛ̣
Alchemical Symbols is a Unicode block containing symbols for chemicals and substances used in ancient and medieval alchemy texts. Many of the symbols are duplicates or redundant with previous characters. [3] Few fonts support more than a few characters in this block as of 2021. One that does and is free for personal use is Symbola 14.0.
Hold Ctrl + ⇧ Shift + U and type up to eight hex digits, then release Ctrl + ⇧ Shift + U. Type Ctrl + ⇧ Shift + U, then type up to eight hex digits, then type ↵ Enter. In LibreOffice, OpenOffice.org and Inkscape, for example, only the second method works. In GTK only the third method works.