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18 hours ago · Complex number. A complex number can be visually represented as a pair of numbers (a, b) forming a vector on a diagram called an Argand diagram, representing the complex plane. Re is the real axis, Im is the imaginary axis, and i is the "imaginary unit", that satisfies i2 = −1. In mathematics, a complex number is an element of a number system ...
18 hours ago · The multivariate normal distribution is said to be "non-degenerate" when the symmetric covariance matrix is positive definite. In this case the distribution has density [5] where is a real k -dimensional column vector and is the determinant of , also known as the generalized variance.
2 hours ago · Amazon air fryer with 9 cooking functions is on sale for $30 off. The COSORI Air Fryer is on sale for $85.49 on Amazon, down from the original price of $119.99. The air fryer comes with nine cooking functions, including air fry, roast, bake, broil, dehydrate, frozen, proof, reheat, and keep warm. By Eleanor Tolbert.
