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[5] 46 is the largest even integer that cannot be expressed as a sum of two abundant numbers. It is also the sixteenth semiprime. [6] Since it is possible to find sequences of 46+1 consecutive integers such that each inner member shares a factor with either the first or the last member, 46 is an Erdős–Woods number. [7]
It is equal to the frequency ratio (1.5) 12 ⁄ 2 7 = 531441 ⁄ 524288 ≈ 1.01364, or about 23.46 cents, roughly a quarter of a semitone (in between 75:74 and 74:73 [2]). The comma that musical temperaments often "temper" is the Pythagorean comma.
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]
Ptolemy's theorem states that the sum of the products of the lengths of opposite sides is equal to the product of the lengths of the diagonals. When those side-lengths are expressed in terms of the sin and cos values shown in the figure above, this yields the angle sum trigonometric identity for sine: sin( α + β ) = sin α cos β + cos α sin ...
The two primes in the product may equal each other, so the semiprimes include the squares of prime numbers. Because there are infinitely many prime numbers, there are also infinitely many semiprimes. Semiprimes are also called biprimes, [1] since they include two primes, or second numbers, [2] by analogy with how "prime" means "first".
For 2025, total U.S. travel spending is projected to grow 3.9% to $1.35 trillion, which is about equal to pre-pandemic 2019 levels (adjusted for inflation). Additional growth to $1.46 trillion is ...
Sack – originally a medieval unit of mass, equal to 26 stone (364 pounds, or about 165 kg). Since a unit of dry volume, equal to 24 imperial gallons (about 109 liters). Schoenus – a unit of area or length; Scrupulum – a unit of area, mass, or time; Seam – a unit of mass or volume; Seer – a unit of mass or volume
WASHINGTON (Reuters) -U.S. President-elect Donald Trump on Saturday named his social media platform CEO Devin Nunes to lead an intelligence advisory panel and said his former intelligence chief ...