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U+2252 ≒ APPROXIMATELY EQUAL TO OR THE IMAGE OF: Which is used like "≈" or "≃" in Japan, Taiwan, and Korea. U+2253 ≓ IMAGE OF OR APPROXIMATELY EQUAL TO: A reversed variation of U+2252 ≒ APPROXIMATELY EQUAL TO OR THE IMAGE OF. U+225F ≟ QUESTIONED EQUAL TO: U+2A85 ⪅ LESS-THAN OR APPROXIMATE: U+2A86 ⪆ GREATER-THAN OR APPROXIMATE
The graph of the absolute value function for real numbers The absolute value of a number may be thought of as its distance from zero.. In mathematics, the absolute value or modulus of a real number, denoted | |, is the non-negative value of without regard to its sign.
For example, [0, 1] means greater than or equal to 0 and less than or equal to 1. Closed intervals have one of the following forms in which a and b are real numbers such that a ≤ b : {\displaystyle a\leq b\colon }
Possible interpretations include "x is greater than y" and "x is the father of y". Relations of valence 0 can be identified with propositional variables, which can stand for any statement. One possible interpretation of R is "Socrates is a man". A function symbol, with some valence greater than or equal to 0
Putting it another way, according to the Rouché–Capelli theorem, any system of equations (overdetermined or otherwise) is inconsistent if the rank of the augmented matrix is greater than the rank of the coefficient matrix. If, on the other hand, the ranks of these two matrices are equal, the system must have at least one solution.
The standard model of long-duration gamma-ray bursts (GRBs) holds that these explosions are ultra-relativistic (initial γ greater than approximately 100), which is invoked to explain the so-called "compactness" problem: absent this ultra-relativistic expansion, the ejecta would be optically thick to pair production at typical peak spectral ...
In 1930, Lev Schnirelmann proved that any natural number greater than 1 can be written as the sum of not more than C prime numbers, where C is an effectively computable constant; see Schnirelmann density. [11] [12] Schnirelmann's constant is the lowest number C with this property. Schnirelmann himself obtained C < 800 000.
For example, the probability that it lives longer than 5 hours, but shorter than (5 hours + 1 nanosecond), is (2 hour −1)×(1 nanosecond) ≈ 6 × 10 −13 (using the unit conversion 3.6 × 10 12 nanoseconds = 1 hour). There is a probability density function f with f(5 hours) = 2 hour −1.