Recent content by janvdl

  1. J

    MHB What courses are included in a rigorous mathematics curriculum for a scientist?

    This semester: Algebra (Groups) Graph Theory Next: Galois Theory
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    MHB Proving Degrees of Vertices in Graph G

    Is this question complete? It seems truncated.
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    MHB Recognisable colourings of graphs

    Do these go by any other name? I'm really struggling to find information on them. So far I've found a paper on it by Chartrand & Lesniak. (Dull)
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    High School How do I check if a 1x1 matrix is diagonal, lower/upper triangular?

    By definition a 1x1 matrix will be upper and lower triangular. (But not strictly; for strictly upper and lower: a must be 0). A matrix is diagonal if it is triangular and normal. Normal (for a matrix whose elements lie in the domain of real numbers) means A \ A^T = A^T \ A