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Decimal places (world records in bold) All records from 1400 onwards are given as the number of correct decimal places. 1400: Madhava of Sangamagrama: Discovered the infinite power series expansion of π now known as the Leibniz formula for pi [13] 10: 1424: Jamshīd al-Kāshī [14] 16: 1573: Valentinus Otho: 355 ⁄ 113: 6 1579: François ...
Hexadecimal floating-point constants follow similar rules, except that they must be prefixed by 0x and use p or P to specify a binary exponent, e.g. 0xAp-2 (which has the value 2.5, since A h × 2 −2 = 10 × 2 −2 = 10 ÷ 4). Both decimal and hexadecimal floating-point constants may be suffixed by f or F to indicate a constant of type float ...
OSPF is a layer 3 protocol. If a layer 2 switch is between the two devices running OSPF, one side may negotiate a speed different from the other side. This can create an asymmetric routing on the link (Router 1 to Router 2 could cost '1' and the return path could cost '10'), which may lead to unintended consequences.
The ASA (as for American Standards Association) photographic exposure system, originally defined in ASA Z38.2.1 (since 1943) and ASA PH2.5 (since 1954), together with the DIN system (DIN 4512 since 1934), became the basis for the ISO system (since 1974), currently used worldwide (ISO 6, ISO 2240, ISO 5800, ISO 12232).