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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
Low-density parity-check (LDPC) codes are a class of highly efficient linear block codes made from many single parity check (SPC) codes. They can provide performance very close to the channel capacity (the theoretical maximum) using an iterated soft-decision decoding approach, at linear time complexity in terms of their block length.
Corrigendum is the gerundive form of the Latin compound verb corrigo -rexi -rectum (from the verb rego, "to make straight, rule", plus the preposition cum, "with"), "to correct", [3] and thus signifies [4] "(those things) which must be corrected" and in its single form Corrigendum it means "(that thing) which must be corrected".
A checksum of a message is a modular arithmetic sum of message code words of a fixed word length (e.g., byte values). The sum may be negated by means of a ones'-complement operation prior to transmission to detect unintentional all-zero messages.
In general, a quantum code for a quantum channel is a subspace , where is the state Hilbert space, such that there exists another quantum channel with () = =, where is the orthogonal projection onto .
The manicule, ☛, is a typographic mark with the appearance of a hand with its index finger extending in a pointing gesture. Originally used for handwritten marginal notes, it later came to be used in printed works to draw the reader's attention to important text.
Most newspaper errors are relatively minor, but even mere typos or atomic typos can adversely affect a story, such as: . Names – Names misspelled, someone was misidentified (e.g., in a photograph), their professional title was incorrect.
The idea of "corrective labor" (Russian: исправительные работы) in Soviet Russia dates back as far as December 1917. [6]From 1929 the USSR started using the terminology "corrective-labor camps" (Russian: исправительно-трудовые лагеря (ИТЛ)) [7] and "corrective labor colonies" (Russian: исправительно-трудовые колонии ...