"It can calculate the square root of a 10-bit binary number (within the decimal integer 900) by designing DNA sequences and programming DNA strand displacement reactions," the paper reads.

This means they are made of both real numbers and the imaginary number i: the square root of negative 1. Remember, a square root of a number represents a number whose square is the original number.

And, all of NumPy’s operations take place outside the Python runtime, so they aren’t constrained by Python’s limitations. Using NumPy for array and matrix math in Python ...