Tomohiro Yamada
Identifiers
- name variant Tomohiro Yamada 0.60 · backfill
Papers (14)
- A generalization of the Ramanujan-Nagell equation math.NT · 2017 · author #1
- Infinitary superperfect numbers math.NT · 2017 · author #1
- On the simultaneous equations $\sigma(2^a)=p^{f_1}q^{g_1}, \sigma(3^b)=p^{f_2}q^{g_2}, \sigma(5^c)=p^{f_3}q^{g_3}$ math.NT · 2017 · author #1
- Quasiperfect numbers with the same exponent math.NT · 2016 · author #1
- Explicit Chen's theorem math.NT · 2015 · author #1
- Explicit formulae for primes in arithmetic progressions, II math.NT · 2013 · author #1
- Explicit formulae for primes in arithmetic progressions, I math.NT · 2013 · author #1
- On equations $\sigma(n)=\sigma(n+k)$ and $\varphi(n)=\varphi(n+k)$ math.NT · 2010 · author #1
- Unitary super perfect numbers math.NT · 2008 · author #1
- On some properties of $\sigma(N)$ math.NT · 2007 · author #1
- A note on the paper by Bugeaud and Laurent "Minoration effective de la distance p-adique entre puissances de nombres alg\'ebriques" math.NT · 2006 · author #1
- Multiplicative structures of values of the sum-of-divisors function math.NT · 2005 · author #1
- On the divisibility of odd perfect numbers by a high power of a prime math.NT · 2005 · author #1
- A quantitative version of the Roth-Ridout theorem math.NT · 2003 · author #1