User Yuichiro Fujiwara - MathOverflow

Yuichiro Fujiwara

Member for 11 years, 5 months
Last seen more than a month ago

its.caltech.edu/~yuichiro
Pasadena, CA

57 Answers

Score Activity Newest

45 votes

Accepted

Show that this ratio of factorials is always an integer

answered May 11, 2013 at 7:37

32 votes

New grand projects in contemporary math

answered Dec 30, 2012 at 22:20

19 votes

Math for a cake

answered Dec 29, 2012 at 10:00

17 votes

Modern Mathematical Achievements Accessible to Undergraduates

answered May 5, 2013 at 20:22

17 votes

Approximation of sum of the first binomial coefficients for fixed N

answered Feb 5, 2017 at 15:26

15 votes

Random vs Unknown

answered Oct 16, 2013 at 5:20

15 votes

Mathematical Paper That Just Links Two Different Fields of Sciences

answered Mar 28, 2013 at 14:52

14 votes

What are the major open problems in design theory nowaday?

answered Jan 10, 2013 at 20:05

13 votes

Accepted

On the Steiner system $S(4,5,11)$

answered Jun 8, 2014 at 18:15

12 votes

Two questions about combinatorics journals

answered Apr 4, 2013 at 18:34

11 votes

Are there proofs that you feel you did not "understand" for a long time?

answered May 17, 2013 at 3:22

10 votes

Handling arXiv feeds to avoid duplicates

answered Jan 4, 2013 at 6:09

10 votes

Should science authors discourage / boycott the recent push for author IDs

answered Jan 6, 2013 at 14:23

10 votes

Accepted

Ways of choosing k items out of n with exactly one symbol in common

answered Nov 5, 2012 at 7:45

9 votes

Best upper bound on rate for q-ary codes

answered May 12, 2013 at 0:19

9 votes

Accepted

Mathematical research papers in general science journals

answered Sep 13, 2014 at 11:37

8 votes

Accepted

covering designs of the form $(v,k,2)$

answered Jan 3, 2015 at 23:39

8 votes

Accepted

Bounded Hamming distance

answered Apr 30, 2013 at 4:36

8 votes

Number of Permutations?

answered Oct 15, 2013 at 23:09

8 votes

What is the largest number of k-element subsets of a given n-element set S such that…

answered May 31, 2013 at 9:28

8 votes

What are some examples of mathematicians who had an unconventional education?

answered Jun 12, 2013 at 11:17

7 votes

Accepted

On the maximum number of $t$-subset of $\{1,\ldots, n\}$ having pairwise singleton or empty intersections

answered Sep 14, 2014 at 1:59

7 votes

Accepted

Constructions of $2-(v,3,3)$-designs

answered Dec 10, 2013 at 16:33

7 votes

Accepted

Codes with a twisted cyclic action

answered May 22, 2017 at 4:40

7 votes

Accepted

"Codes" in which a group of words are pairwise different at a certain position

answered Jun 20, 2014 at 14:57

6 votes

Almost Hadamard matrices

answered Feb 5, 2014 at 15:46

6 votes

Bounded Hamming distance

answered May 1, 2013 at 1:23

6 votes

Accepted

Is there an infinite number of combinatorial designs with $r=\lambda^{2}$

answered Dec 27, 2012 at 17:59

6 votes

What is a random number? (poll experiment)

answered Jan 1, 2013 at 23:08

5 votes

Hot-topics in error correcting coding related to interesting math. ?

answered Jan 4, 2013 at 11:14

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