Sieve methods: what are they, and what are they good for? - James Maynard

Analysis Seminar
Topic: Sieve methods: what are they, and what are they good for?
Speaker: James Maynard
Affiliation: Member, School of Mathematics
Date: December 13, 2017
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Пікірлер: 10

  • @kevinabate6056
    @kevinabate60566 жыл бұрын

    The sum of "mobius of n" over n, for n>2 was going to converge to zero. This is great for when we look at the density of a set formed by sieving 0 mod "all the primes" or "n mod 'all the primes'" when n is a positive integer. The problem I run into is where we DON'T use residue classes across all the primes as moduli with a singleton finite intersection property. In weak terms, I don't get a coset being eliminated so the density calculation should not converge to zero. I'll go over the weak coset theorems again on my end, but I recall looking at sieving {1 mod 2} and {0 mod p} for primes greater than 2 as an example to show what happens when there's no coset of Z+ (positive integers) sieved. _The fraction_ of the density vanishes exponentially. What happens is we don't see powers of 2 sieved out and therefore the number of elements not sieved expands asymptotically with log_2 of n + O(1) in the interval (0,n] when "n" goes to infinity. Is that correct as simple example?

  • @ireallyamrumi
    @ireallyamrumi5 жыл бұрын

    The pairs of differential equations reminded me of Fourier transforms...I wonder if there is an approximate counting link between sieve methods and Fourier methods...

  • @AlexandrBorschchev
    @AlexandrBorschchev4 жыл бұрын

    i'm grade 9, thanks for wikipedia for teaching me to understand this, it's easy for me to learn them.

  • @greatstuff5
    @greatstuff55 жыл бұрын

    So this is where the mobius function plays a key role

  • @MarkusDarkess
    @MarkusDarkess5 жыл бұрын

    Hello

  • @lultopkek

    @lultopkek

    3 жыл бұрын

    yoooo

  • @cupass6179

    @cupass6179

    2 жыл бұрын

    Hi!

  • @priscilla6865
    @priscilla68654 жыл бұрын

    awful eraser

  • @kudoamv
    @kudoamv6 жыл бұрын

    Seems like the guy is too intelligent with MATH , assumes we know most of it.