👉 In mathematics, a quartan is a number that can be expressed in the form of x^4 + 2x^3 + 1. It represents a specific class of numbers known as "quartic functions." These are polynomials of degree four and have real coefficients. Quartans are also known as "quartic polynomials" or "quartic functions" because they can be defined in terms of the power series representation for quadratic functions, which is a special case of the general