Sheffer stroke operation - significado y definición. Qué es Sheffer stroke operation
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Qué (quién) es Sheffer stroke operation - definición

LOGICAL OPERATION
Logical nand; Sheffer's stroke; Alternative denial; Inclusive nand; Logical NAND; Sheffer Stroke; Sheffer connective; NAND operator; Scheffers stroke; Sheffers stroke; ⊼
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Sheffer stroke         
In Boolean functions and propositional calculus, the Sheffer stroke denotes a logical operation that is equivalent to the negation of the conjunction operation, expressed in ordinary language as "not both". It is also called nand ("not and") or the alternative denial, since it says in effect that at least one of its operands is false.
Glen C. Sheffer         
ILLUSTRATOR (1881-1948)
Glen Sheffer
Glen C. Sheffer (1881–1948) was an illustrator whose most notable work was a poster for the 1933 Chicago World's Fair.
Zero stroke         
  • Germany, 1923: banknotes had lost so much value that they were used as [[wallpaper]].
  • Weimar Republic hyperinflation from one to one trillion paper Marks per gold Mark. Note the logarithmic scale
URBAN LEGEND ABOUT A MENTAL DISORDER DIAGNOSED BY PHYSICIANS IN GERMANY UNDER THE WEIMAR REPUBLIC THAT CONSISTED OF THE DESIRE OF PATIENTS TO WRITE ENDLESS ROWS OF ZEROS DUE TO STRESS FROM HYPERINFLATION
Cipher stroke; Zero Stroke
Zero stroke or cipher stroke was an alleged mental disorder, reportedly diagnosed by physicians in Germany during the hyperinflation in the Weimar Republic (1921–24). The disorder was primarily characterized by the desire of patients to write endless rows of zeros, which are also referred to as ciphers.

Wikipedia

Sheffer stroke

In Boolean functions and propositional calculus, the Sheffer stroke denotes a logical operation that is equivalent to the negation of the conjunction operation, expressed in ordinary language as "not both". It is also called nand ("not and") or the alternative denial, since it says in effect that at least one of its operands is false. In digital electronics, it corresponds to the NAND gate. It is named after Henry M. Sheffer and written as ↑ or as | (but not as ||, often used to represent disjunction). In Bocheński notation it can be written as Dpq.

Its dual is the NOR operator (also known as the Peirce arrow or Quine dagger). Like its dual, NAND can be used by itself, without any other logical operator, to constitute a logical formal system (making NAND functionally complete). This property makes the NAND gate crucial to modern digital electronics, including its use in computer processor design.