Results 101 to 110 of about 11,354,844 (246)
Determinants and Compositions of Natural Numbers
, 2010 We consider a particular type of matrices which belong at the same time to the class of Hessenberg and Toeplitz matrices, and whose determinants are equal to the number of a type of compositions of natural numbers. We prove a formula in which the number of weak compositions with a fixed number of zeroes is expressed in terms of the number of ...
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On Highly Composite and Similar Numbers [PDF]
Transactions of the American Mathematical Society, 1944 Paul Erdös, L. Alaoglu
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Jixie chuandong, 2014 According to the basic structure characteristics of elastic composite cylindrical roller bearing,researches on dynamic radial stiffness of elastic composite cylindrical roller bearing are carried out in detail.The finite element analysis software is ...
姚齐水, 张然, 余江鸿, 杨文
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Composite Numbers in an Arithmetic Progression
One challenge (or opportunity!) that many instructors face is how varied the backgrounds, abilities, and interests of students are. In order to simultaneously instill confidence in those with weaker preparations and still challenge those able to go faster, an instructor must be prepared to give problems of different difficulty levels. Using Dirichlet's
Chu, Hung Viet +2 more
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Counting Composite and Prime Numbers
, 2020 Abstract: The set of positive integers can be divided into different sub-sets, such as the sets of even numbers, of odd numbers, of primes and of composites. Unlike the patterns for even numbers and odd numbers, no repetitive pattern has been identified for readily locating all the primes within the number line and hence by definition to readily locate
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Characteristics of natural convection heat transfer in composite cavity
Case Studies in Thermal EngineeringIn order to study the influence of the nature of the mining airspace on the natural convection heat transfer in the unventilated working face, we establish a numerical model of natural convection in a composite cavity containing porous media by CFD ...
Changkui Lei +5 more
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Determining the optimum number of increments in composite sampling
, 2008 John E. Hathaway +4 more
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CARD APPEARANCE NUMBERS AND COMPOSITION
Payment cards have evolved from embossed paper tokens in the 1920s to today’s multilayered, data-rich, machine-readable artefacts. Their outward appearance—the printed design, dimension, embossing and embedded electronics—hides a precisely standardised internal logic.
Abdisamatov, Otabek, Najimov, Zohid
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