k-ary Divisor

writer : Guy, R. K.

source : nsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag

page : ...

25-11-2020 849

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Prime Power

writer : Hardy, G. H.

source : Ramanujan: Twelve Lectures on Subjects Suggested by His Life and Work, 3rd ed. New York: Chelsea, 1999.

page : ...

19-1-2021 1490

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Exact Covering System

writer : Guy, R. K.

source : "Exact Covering Systems." §F14 in Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag

page : pp. 253-256

8-1-2020 1272

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Class Number

writer : Arno, S

source : "The Imaginary Quadratic Fields of Class Number 4." Acta Arith. 40

page : ...

31-12-2019 3407

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Polymorph

writer : المرجع الالكتروني للمعلوماتيه

source : www.almerja.com

page : ...

5-6-2020 1472

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Sultan,s Dowry Problem

writer : Honsberger, R.

source : "Some Surprises in Probability." Ch. 5 in Mathematical Plums (Ed. R. Honsberger). Washington, DC: Math. Assoc. Amer

page : ...

22-4-2020 1394

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Diophantine Equation--5th Powers

writer : Berndt, B. C.

source : Ramanujan,s Notebooks, Part IV. New York: Springer-Verlag

page : ...

20-5-2020 5790

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N

writer : Sloane, N. J. A.

source : Sequence A000027/M0472 in "The On-Line Encyclopedia of Integer Sequences."

page : ...

22-7-2020 1424

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Negative

writer : Cajori, F

source : A History of Mathematical Notations, Vols. 1-2. New York: Dover, 1993.

page : ...

17-12-2019 1313

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Ball Tetrahedron Picking

writer : Kingman, J. F. C.

source : "Random Secants of a Convex Body." J. Appl. Prob. 6

page : ...

5-2-2020 1026

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Counting

writer : W.D. Wallis

source : Mathematics in the Real World

page : 19-22

5-2-2016 2307

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Champernowne Constant Continued Fraction

writer : Havermann, H.

source : "Numbers of Digits in Some Champernowne-Continued-Fraction Terms." https://odo.ca/~haha/cfcd.html.

page : ...

28-4-2020 1486

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Rule of Three

writer : Hersee, J.

source : "Multiplication is Vexation." Paradigm 24, 1997. http://faculty.education.illinois.edu/westbury/paradigm/Hersee.html.

page : ...

30-10-2019 1241

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Batrachion

writer : Pickover, C. A.

source : "The Crying of Fractal Batrachion 1489." Ch. 25 in Keys to Infinity. New York: W. H. Freeman

page : ...

30-12-2020 1461

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Truncated Tetrahedral Number

writer : Conway, J. H. and Guy, R. K.

source : The Book of Numbers. New York: Springer-Verlag,

page : ...

25-12-2020 1321

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Wallis,s Problem

writer : Dickson, L. E.

source : History of the Theory of Numbers, Vol. 1: Divisibility and Primality. New York: Dover

page : pp. 54-56

20-11-2020 1348

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Ore,s Conjecture

writer : Sloane, N. J. A

source : Sequences A099377 and A099378 in

page : ...

26-11-2020 1136

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Logistic Map

writer : Bailey, D. H

source : Multiprecision Translation and Execution of Fortran Programs." ACM Trans. Math. Software 19

page : ...

20-1-2020 5390

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