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1,3,5,7-Tetramethyl-1,3,5,7-tetrasilaadamantane is the organosilicon compound with the formula (CH 2) 6 (SiCH 3) 4. It is a colorless solid that is soluble in organic solvents. The compound is one of the iconic carbosilanes, featuring alternating −Si−C−Si−C− linkages. [2] Otherwise it can be described as a diamondoid cluster.
[1] [2] Every positive integer is composite, prime, or the unit 1, so the composite numbers are exactly the numbers that are not prime and not a unit. [3] [4] E.g., the integer 14 is a composite number because it is the product of the two smaller integers 2 × 7 –ut the integers 2 and 3 are not because each can only be divided by one and itself.
Download as PDF; Printable version; ... a superior highly composite number is a natural number which, ... 2 4 ⋅ 3 2 ⋅ 5 ⋅ 7 ⋅ 11 : 4,2,1,1,1 120 2 2 ⋅ 6 ⋅ ...
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Desktop publishing (DTP) application allows opening and editing of PDF documents; Allows compatible saving as PDF 1.3, 1.4, 1.5 and 1.7 and supports also PDF/X1, PDF/X1a and PDF/X-3. pdf-parser: Public Domain Python script Yes Extraction and analysis tool, handles corrupt and malicious PDF documents. PDFedit: GNU GPL: Yes Yes BSD Yes
In number theory, a Smith number is a composite number for which, in a given number base, the sum of its digits is equal to the sum of the digits in its prime factorization in the same base. In the case of numbers that are not square-free , the factorization is written without exponents, writing the repeated factor as many times as needed.
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The prefix usually takes the form 10.NNNN, where NNNN is a number greater than or equal to 1000, whose limit depends only on the total number of registrants. [14] [15] The prefix may be further subdivided with periods, like 10.NNNN.N. [16] For example, in the DOI name 10.1000/182, the prefix is 10.1000 and the suffix is 182.