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In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics.
The means to make the toric code, or the planar code, into a fully self-correcting quantum memory is often considered. Self-correction means that the Hamiltonian will naturally suppress errors indefinitely, leading to a lifetime that diverges in the thermodynamic limit.
Telephone numbers in Iraq. Iraq area codes can be 1 or 2 digits (not counting the trunk prefix 0) and the subscriber numbers are usually 6 digits. In Baghdad and some other governorates, they are 7 digits. The mobile numbers have 10 digits, beginning with the 3-digit code of each operator followed by 7 digits.
Airline codes IATA ICAO Airline Call sign Country Comments JW VNL Vanilla Air: VANILLA Japan Merged with Peach Aviation: VU VAG Vietravel Airlines: VIETRAVEL AIR Vietnam VAI Volant Aviation International: Pakistan VAR Veca Airlines: VECA El Salvador VLR Volare 22 X: VOLAX Mexico VDR Voldirect: VOLDIR France VVV Valair Aviação Lda: VALAIRJET ...
The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional Operator Toll Dialing during the World War II period. The program had the goal of speeding the connecting times for long-distance calling by eliminating intermediary telephone operators.
Telephone numbers in Israel consist of an area code and a subscriber number. The dial plan type in Israel is closed, and "0" is the internal trunk prefix in Israel. Israel's country calling code is +972. When dialing an Israeli number from inside of Israel, the format is: "0 - area/network operator code (A/N) - subscriber number (X)"
00 + Country Code + Destination Code + Subscriber Number. Calls to North America from anywhere in Armenia receive a substantial discount if preceded by a special code specific to each Armenian phone company. For example, if one makes a call from a Vivacell-MTS phone to North America and dials 77 first, one is charged 14 AMD per minute.
Exclusive or, exclusive disjunction, exclusive alternation, logical non-equivalence, or logical inequality is a logical operator whose negation is the logical biconditional. With two inputs, XOR is true if and only if the inputs differ (one is true, one is false). With multiple inputs, XOR is true if and only if the number of true inputs is odd.