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MTProto 1.0 was deprecated in favor of MTProto 2.0 in December 2017, which was deployed in Telegram clients as of v4.6. Version 2.0 was proven formally correct in December 2020 by a team from the University of Udine, Italy. The team reviewed the protocol after realizing that they could only find in-depth verifications done of version 1.0, where ...
Big O notation is a mathematical notation that describes the limiting behavior of a function when the argument tends towards a particular value or infinity. Big O is a member of a family of notations invented by German mathematicians Paul Bachmann, [1] Edmund Landau, [2] and others, collectively called Bachmann–Landau notation or asymptotic ...
VASP Flight 168. A VASP Boeing 727-2A1, similar to the one involved in the accident. VASP Flight 168, a Boeing 727-212 registered PP-SRK, was a scheduled passenger flight from São Paulo to Fortaleza, Brazil which, on June 8, 1982, crashed into a mountainside, while descending into Fortaleza, killing all 137 people on board. [1]
The Class 168 is carpeted throughout with luggage racks, air conditioning, and two or more toilets per set (one for disabled users, with baby changing facilities). Passenger information systems are fitted in every car and on the outside of class 168/2 cars. Variants. Three different variants of the 168 were produced - 168/0, 168/1 and 168/2.
Zero-based numbering is a way of numbering in which the initial element of a sequence is assigned the index 0, rather than the index 1 as is typical in everyday non-mathematical or non-programming circumstances. Under zero-based numbering, the initial element is sometimes termed the zeroth element, [1] rather than the first element; zeroth is a ...
O (О о; italics: О о) is a letter of the Cyrillic script. The letter most commonly represents the sound /ɔ/, like the o in "off". In Russian and Serbo-Croatian , it represents the sound /o/.
1 Control-C has typically been used as a "break" or "interrupt" key. 2 Control-D has been used to signal "end of file" for text typed in at the terminal on Unix / Linux systems. Windows, DOS, and older minicomputers used Control-Z for this purpose. 3 Control-G is an artifact of the days when teletypes were in use.
Classification. O-type stars are classified by the relative strength of certain spectral lines. The key lines are the prominent He + lines at 454.1 nm and 420.0 nm, which vary from very weak at O9.5 to very strong in O2–O7, and the He 0 lines at 447.1 nm and 402.6 nm, which vary from absent in O2/3 to prominent in O9.5.