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Mathematics
Marco Ripà's user avatar
Marco Ripà's user avatar
Marco Ripà's user avatar
Marco Ripà
  • Member for 2 years, 2 months
  • Last seen more than a week ago
  • Italy
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About

Independent Researcher with a wide range of interests. Author of some number theory and graph theory papers (hyperoperators, paths and trails covering any d-dimensional hypercubic lattice, primality&factorization, knight's tour problem, and so forth). Elected Genius of the Year 2014 – Europe by members of the World Genius Directory and by the World Intelligence Network Executive Committee, mainly for his fundamental contribution to the creation of the first dynamic IQ tests. Enthusiastic contributor for the OEIS (author of 130+ integer sequences).

ORCID iD: 0000-0002-6036-5541

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Top posts
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4
Convergence value of the unique positive real root of ${^{m + 1}x} = {^{m}x} + 1$ as $m$ approaches infinity
Aug 12, 2022
4
How can I calculate the decimals of a number like this?
Jul 5, 2022
4
Easy proof that $n=5$ is the only solution of $n^n \equiv n^{n^n} \pmod {10^{n-1}}$ if $n \in \mathbb{N}-\{0,1\}$ is not a multiple of $10$
Feb 14
3
Where does the superfactorial sit on the fast growing hiearchy?
Jan 20
3
Extend an arbitrary multidimensional cube in such a way it stays a cube
Oct 9, 2023
3
smallest prime number made of consecutive numbers as its digits in decimal representation
Jul 1, 2022
3
Find the maximum value of an algebraic expression.
Mar 10, 2023
3
The $27$ dots problem
Jun 19
3
Minimum number of edges for a tree that joins the $27$ nodes of a $3 \times 3 \times 3$ regular grid
Jan 20
3
Is it possible to arrange 13 counters on a 5x5 grid such that all 2x2 squares are unique?
Dec 3, 2022
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15
Where can I create nice looking graphics for a paper?
11
Open problems in chess involving maximum material imbalances
8
Joining the $2^k$ points of $\{0,1\}^k$ with the shortest tree
6
Open problems which might benefit from computational experiments
5
Video abstracts for mathematical papers