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    • rapha
    • 12 May 2025
      • created 12 May 2025 04:06
      • updated 12 May 2025 04:30

    Some fun with Euler’s identity

    • rapha
    • 10 May 2025
      • created 10 May 2025 16:56
      • updated 10 May 2025 17:55

    Computing the prime ideals in the ring of polynomials with integer coefficients

    • rapha
    • 10 May 2025
      • created 10 May 2025 01:10
      • updated 10 May 2025 01:10
    • 1 category
      • Books for math.

    Books

    • rapha
    • 8 May 2025

    Quote Garden

    • rapha
    • 3 May 2025
      • created 3 May 2025 17:16
      • updated 8 May 2025 23:40

    Relative primality of polynomials over a UFD is preserved over the fraction field

    • rapha
    • 3 May 2025
      • created 3 May 2025 15:19
      • updated 3 May 2025 15:42

    Some notes on relative primality

    • rapha
    • 2 May 2025
      • created 2 May 2025 17:48
      • updated 3 May 2025 17:20

    Ideal-theoretic characterization of irreducibility

    • rapha
    • 1 May 2025
      • created 1 May 2025 17:05
      • updated 3 May 2025 17:45

    Computing the prime ideals in the ring of complex polynomials in two variables

    • rapha
    • 28 Apr 2025

    Examples of funny a priori analytic knowledge

    • rapha
    • 26 Apr 2025

    Revisiting the infinitude of primes

    • rapha
    • 25 Apr 2025
      • created 25 Apr 2025 01:59
      • updated 25 Apr 2025 02:24

    Minimal polynomial, naturally

    • rapha
    • 15 Mar 2025
      • created 15 Mar 2025 22:01
      • updated 16 Mar 2025 18:52

    The subobject classifier in the category of representations of a monoid

    • rapha
    • 13 Mar 2025
      • created 13 Mar 2025 02:27
      • updated 13 Mar 2025 15:46

    On subobject classifiers

    • rapha
    • 24 Feb 2025
      • created 24 Feb 2025 21:46
      • updated 3 Mar 2025 16:46

    The many faces of Nakayama’s Lemma

    • rapha
    • 23 Feb 2025
      • created 23 Feb 2025 23:44
      • updated 3 Mar 2025 16:53

    On integral morphisms

    • rapha
    • 23 Feb 2025
      • created 23 Feb 2025 19:36
      • updated 24 Feb 2025 13:05

    On algebras over a ring

    • rapha
    • 22 Feb 2025

    On the cotangent space on a smooth manifold, defined from its structure sheaf

    • rapha
    • 22 Feb 2025
      • created 22 Feb 2025 16:38
      • updated 22 Feb 2025 18:26

    On direct limits, and computing them from cofinal subsets

    • rapha
    • 22 Feb 2025

    Skyscraper sheaves

    • rapha
    • 13 Feb 2025
      • created 13 Feb 2025 15:39
      • updated 16 Feb 2025 15:31

    A characteristic feeling: exploring characteristic classes - Part 1, cohomology

    • rapha
    • 8 Feb 2025
      • created 8 Feb 2025 14:36
      • updated 13 Feb 2025 13:51

    The dominance order on partitions

    • rapha
    • 8 Feb 2025
      • created 8 Feb 2025 02:27
      • updated 8 Feb 2025 02:57

    A simpler description for the ideal generated by the symmetric polynomials in two variables

    • rapha
    • 6 Feb 2025
      • created 6 Feb 2025 18:02
      • updated 6 Feb 2025 19:20
    • 1 category
      • Some new math

    Galois connections: examples and theory

    • rapha
    • 5 Feb 2025
      • created 5 Feb 2025 14:19
      • updated 6 Feb 2025 14:57

    Making determinants my friends

    • rapha
    • 3 Feb 2025
      • created 3 Feb 2025 17:30
      • updated 15 Apr 2025 16:36
    • 1 category
      • Some new math

    Filters are generalized subsets, and other small remarks on filters

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