Features I want.txt

- Matrix multiplication - Ṁ<[any],[any]>
- Dot product
- Matrix determinant
- Inverse - 
- Cartesian power - p
- Cartesian product with self 
- Transpose matrix - Ṫ<[any]>
- n x n grid of spaces
- python string methods
    capitalize
    casefold
    center
    count (also lists)
    endswith (also list)
    expandtabs
    find (also list)
    format
    join
    ljust
    lower
    partition
    removeprefix (also list)
    removesuffix (also list)
    replace
    rjust
    split (also list)
    splitlines - S<str>
    startswith (also list)
    strip (also list)
    swapcase
    title
    upper
    zfill
- python list methods
    append 
    extend
    insert
    pop
    remove
    reverse
    sort
- (n, n, s):  a * b grid of c
- (n, n, n): a <= c <= b
- read from file
- write to file
- list of length N (all 0s) (all spaces)
- (n, n): [a + b, a - b]
- (s, s): a surrounded by b
- matrix divide (right matrix divide)
- row sums
- column sums
- diagonals
  - main
  - all
  - anti
- pad list with items
- unpad
- group by
- equals 1
- not equals 1
- (l, l): are any of b in a?
- remove from a stuff in b
- remove from a stuff not in b
- prefixes - k<!num>
- suffixes
- gamma function
- cycle
- rounding
- mirror
  - horizontal 
  - vertical
    - flipped
    - non-flipped
- euler_totient
- a[ - i<num>, i<[num]>
  - b]
  - b:]
  - :b]
  - b:c]
  - b:c:d]
- a with b filtered to the front
- deltas
- Grade list
  - up
  - down
- a[1:-1]
- prepend 0
- every nth item
  - get
  - map
- zip
  - with function
  - with map
  - with other item - z<[any], [any]>
  - with self
- primes
  - nth
  - next
  - prev
  - all less than
  - all greater than (generator)
- proper divisor count
- divisor count
- mean
- mode
- median
- "Index of permutation z in a lexicographically sorted list of all permutations of z's items."
- pairs
- triplets
- integer partition
- partition
- List from −abs(z) to abs(z) inclusive
- permutations
- combinations
  - with replacement
  - withn't that
  - of length n
  - of all lengths
- powerset
- a.replace(b, c)
- a.replace_first(b, c)
- substrings
-