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The symbol also has a HTML entity representations of ±, ±, and ±. The rarer minus–plus sign is not generally found in legacy encodings, but is available in Unicode as U+2213 ∓ MINUS-OR-PLUS SIGN so can be used in HTML using ∓ or ∓. In TeX 'plus-or-minus' and 'minus-or-plus' symbols are denoted \pm and \mp ...
The format of an email address is local-part@domain, where the local-part may be up to 64 octets long and the domain may have a maximum of 255 octets. [5] The formal definitions are in RFC 5322 (sections 3.2.3 and 3.4.1) and RFC 5321—with a more readable form given in the informational RFC 3696 (written by J. Klensin, the author of RFC 5321) and the associated errata.
A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.
The word cross is recorded in 11th-century Old English as cros, exclusively for the instrument of Christ's crucifixion, replacing the native Old English word rood.The word's history is complicated; it appears to have entered English from Old Irish, possibly via Old Norse, ultimately from the Latin crux (or its accusative crucem and its genitive crucis), "stake, cross".
Some versions of the term, such as LGBT+ and LGBTQ+ add a plus sign, to represent additional identities not captured within the acronym. [ 6 ] [ 18 ] Many further variants exist which add additional identities, such as LGBTQIA+ (for intersex , asexual , aromantic , and agender ) [ 19 ] and 2SLGBTQ+ (for two-spirit ), or which order the letters ...
This is because a negative number multiplied by another negative number cancels the sign, and thus gives a positive number. If n is an odd integer, then (−1) n = −1. This is because there will be a remaining −1 after removing −1 pairs. Because of this, powers of −1 are useful for expressing alternating sequences.
Diagram showing positive tip polarity on the left and negative tip polarity on the right. To read diagram: The center positive drawing on the left indicates that the center (also known as the tip) of the output plug is positive (+) and the barrel (ring) of the output plug is negative (−).
The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei composed of protons and neutrons, this is equal to the proton number (n p) or the number of protons found in the nucleus of every atom of that element.