• reflex
    link
    fedilink
    51 year ago

    Did my undergrad in math and never learned what that capital pi-looking thing was. Sigmas all the tyme doe.

      • mohKohn
        link
        fedilink
        11 year ago

        They come up in complex analysis bc writing polynomials in terms of their roots is sometimes useful.

    • Kogasa
      link
      fedilink
      11 year ago

      Convergence issues aside, you can get from a product to a sum by taking logarithms. This is often a feasible way to reason about them / prove results about them.