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Bordered magic square when it is a magic square and it remains magic when the rows and columns on the outer edge are removed. They are also called concentric bordered magic squares if removing a border of a square successively gives another smaller bordered magic square. Bordered magic square do not exist for order 4.
Ramanujan magic square construction Image title Construction of Ramanujan's magic square from a mutually orthogonal Latin square, its transpose and day (D), month (M), century (C) and year (Y) values, and Ramanujan's example, drawn by CMG Lee.
Srinivasa Ramanujan Aiyangar [a] (22 December 1887 – 26 April 1920) was an Indian mathematician.Often regarded as one of the greatest mathematicians of all time, though he had almost no formal training in pure mathematics, he made substantial contributions to mathematical analysis, number theory, infinite series, and continued fractions, including solutions to mathematical problems then ...
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Construction of Ramanujan's birthday magic square from a 4×4 Latin square with distinct diagonals and day (D), month (M), century (C) and year (Y) values, and Ramanujan's birthday example. The problem of determining if a partially filled square can be completed to form a Latin square is NP-complete. [22]
1729 is composite, the squarefree product of three prime numbers 7 × 13 × 19. [1] It has as factors 1, 7, 13, 19, 91, 133, 247, and 1729. [2] It is the third Carmichael number, [3] and the first Chernick–Carmichael number.
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Ramanujan magic square; Journals. Hardy–Ramanujan Journal; ... Ramanujan Hostel, Indian Institute of Management, Calcutta [3] Ramanujan computer centre, ...