User:Michal Paulovic

• Amateur mathematician and professional electrician skilled in cybernetics, usually programming and repairing computers for a living

• Interested in fixed points, near-integers, aliquot sequences and equable shapes, having contributed to 34 OEIS entries since 2014

Interesting numbers

• 216 : the surface area and the volume of an equable cube with the side length of 6, also the value of Φ(666) and 3³ + 4³ + 5³ = 6³

• 364.5 : the surface area and the volume of an equable rectangular cuboid with its base perimeter (4.5 * 4) equal to its height (18)

• 384 : the surface area and the volume of an equable right square pyramid with the base side length of 12 and the height of 8

Favorite expressions

• e^{(π * i)} + 1 = 0 : Euler's identity, the relation between e, π, i, 1 and 0 by the means of exponentiation, multiplication and addition

• √5 / 2 + 1/2 = φ : Golden ratio, the ratio of the number of leaves to the number of turns on the stem of a plant with infinite height

• V - E + F = 2 : Euler's polyhedron formula, the relation between vertices, edges and faces of any convex or spherical polyhedron

• 504 = 2⁹ - 2³ = 7 * 8 * 9 = 12 * 42 = 21 * 24 = 153 + 351 = 14 + ... + 34, also DIV in Roman numerals (Slovak for a WONDER)

• The magic square from Dürer's Melancolia I, engraved in 1514, with magic constant (one of the square's eigenvalues) equal to 34

16	3	2	13
5	10	11	8
9	6	7	12
4	15	14	1