arXiv subjects

Yutaka Nishiyama

Publications and source records attributed to Yutaka Nishiyama.

5 recordsLinked to original sources

arXiv2025

Dynamic transitions of blind spots in the Hermann grid illusion

Hermann discovered the grid illusion in 1870, but its cause has remained a mystery for more than 150 years. In 1960, Baumgartner proposed a hypothesis for the illusion based on neural receptive fields, but Geier presented a counterexample in 2008. In 1995, Schrauf devised the scintillating grid illusion, an improvement on the Hermann grid illusion. I propose that a hypothesis involving blind spots (optic discs) can significantly contribute to unraveling the mystery of the grid illusion.

q-bio.NC↗

arXiv2025

A Dynamic Interference Model for Benham's Top

In 2023, I published a paper titled "A Dynamic Interference Model for Benham's Top." Here, I would like to concisely explain the most important aspect of dynamic interference by organizing and integrating the figures.

q-bio.NC↗

arXiv2016

Revisiting Unit Fractions That Sum To 1

This paper is a continuation of a previous paper. Here, as there, we examine the problem of finding the maximum number of terms in a partial sequence of distinct unit fractions larger than 1/100 that sums to 1. In the previous paper, we found that the maximum number of terms is 42 and introduced a method for showing that. In this paper, we demonstrate that there are 27 possible solutions with 42 terms, and discuss how primes show that no 43-term solution exists.

math.NT↗

arXiv2016

Extending Sicherman Dice to 100-cell Calculation Tables

This paper discusses a 100-cell calculation table for addition, C(i,j)=Ai+Bj,(1<=i,j<=10), addressing the special case where the 100 cells C(i,j) comprise continuous numbers 0 through 99. We consider what sequences {Ai,Bj,(1<=i,j<=10)} are needed to fulfill these conditions, and the number of possible combinations. We first find seven solutions through factorization of the generating function used for Sicherman dice. We next find seven solutions through geometric means. We demonstrate a correspondence between the seven solutions from factorization and the seven from geometry. Finally, we suggest that the number of solutions N for an nxn=n^2-cell calculation table is N=(p-2)(p-1)+1, where p is the number of divisors of n.

math.HO↗

arXiv2015

A Sepak Takraw - Based Molecular Model For C60 - A Mathematical Study Of A 60-Atom Molecule

We mathematically investigate four molecular models of buckminsterfullerene (C60) discussing the strengths and weaknesses of each, and a new orthorhombic 20-dodecahedron model is proposed to replace the traditional truncated icosahedron model. This representation as a sepak takraw ball rather than a soccer ball allows for capturing the positional relations and electron orbits of the 60 atoms comprising the full molecule.

cond-mat.mtrl-sci↗