NOTES.md

    #    1
    # 1  2
    # 2  3
    #    4

    # 1 <- w * 1
    # 2 <- w * 1 + w * 2
    # 3 <- w * 1 + x * 2
    # 4 <- w * 2

    #
    #    1
    # 1  2
    # 2  3
    # 3  4
    #    5
    #

    # 1 <- w * 1
    # 2 >- w * 1 + w * 2
    # 3 <- w * 1 + w * 2 + w * 3
    # 4 <- w * 2 + w * 3
    # 5 <- w * 3

    # Pad in by 1, out by 2. roll i:i + 3
    # W needs dim to match
    # *  *    
    # *  1
    # 1  2
    # 2  3
    # *  4
    # *  *

    
    # *  x  w1  -> sum -> 1
    # *  x  w2
    # 1  x  w3

    #           [*, *] -> sum -> 1
    #           [*, *]
    # [0, 1]  x [w, w]


    # Shrink
    # 1
    # 2  1
    # 3  2
    # 4

    # 1 <- 1 * w + 2 * w + 3 * w
    # 2 <- 2 * w + 3 * w + 4 * w

    # Works as is