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7 is the only number D for which the equation 2 n − D = x 2 has more than two solutions for n and x natural. In particular, the equation 2 n − 7 = x 2 is known as the Ramanujan–Nagell equation. 7 is one of seven numbers in the positive definite quadratic integer matrix representative of all odd numbers: {1, 3, 5, 7, 11, 15, 33}. [19] [20]
First page of a 1555 version of the Siete Partidas, as annotated by Gregorio López.. The Siete Partidas (Spanish pronunciation: [ˈsjete paɾˈtiðas], "Seven-Part Code") or simply Partidas, was a Castilian statutory code first compiled during the reign of Alfonso X of Castile (1252–1284), with the intent of establishing a uniform body of normative rules for the kingdom.
(June 2020) Click [show] for important translation instructions. View a machine-translated version of the Spanish article. Machine translation, like DeepL or Google Translate , is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy ...
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The Diccionario de la lengua española [a] (DLE; [b] English: Dictionary of the Spanish language) is the authoritative dictionary of the Spanish language. [1] It is produced, edited, and published by the Royal Spanish Academy , with the participation of the Association of Academies of the Spanish Language .
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7.3 Culture. 7.4 Writing, ... Download as PDF; Printable version; In other projects ... This view places importance on the study of linguistic typology, ...
Signalling System No. 7 (SS7) is a set of telephony signaling protocols developed in the 1970s that is used to setup and teardown telephone calls on most parts of the global public switched telephone network (PSTN). The protocol also performs number translation, local number portability, prepaid billing, Short Message Service (SMS), and other ...