1 (one)
The number 1 can be represented as a 2×2 unit matrix by
Explanation
A complex number z = a + bi can be written with the 2×2-matrix
and as every real number is also a complex number you get
The number 1 can be represented as a 2×2 unit matrix by
A complex number z = a + bi can be written with the 2×2-matrix
and as every real number is also a complex number you get