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Many of the mathematical functions that are available for matrices are
also applicable to a single row of integers.
In the following list, the symbols `a` and `b` are of the
class `integer_row` and `x`, `i` and `j` are
integers and `o` is a boolean.

`x = a[i];`

`a[i] = y;`

- Read and modify the
`i`-th element of the row`a`. `o = (a == b);`

- Are rows
`a`and`b`are identical? (`!=`

is also available) `c = a + b;`

- Add the corresponding elements of the two rows
`a`and`b`, and put the results in`C`. `c = a - b;`

- Subtract the corresponding elements of the two rows
`a`and`b`, and put the results in`C`. `c = a * b;`

- Multiply the corresponding elements of
`a`and`b`, and put the results in`c`. `c += a;`

- Add the corresponding elements of
`a`to the row`c`. `c -= a;`

- Subtract the corresponding elements of
`a`from the row`c`. `c *= a;`

- Multiply the elements of
`c`by the corresponding elements of`a`. `c = a + x;`

- Add the integer
`x`to each element of`a`, and put the results in`c`. `c = a - x;`

- Subtract the integer
`x`form each element of`a`, and put the results in`c`. `c = a * x;`

- Multiply each element of
`a`by the integer`x`, and put the results in`c`. `c = a / x;`

- Divide each element of
`a`by the integer`x`, and put the results in`c`. `c += x;`

- Add the integer
`x`to each element of`c`. `c -= x;`

- Subtract the integer
`x`from each element of`c`. `c *= x;`

- Multiply each element of
`a`by the integer`x`. `c /= x;`

- Divide each element of
`a`by the integer`x`.

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