Abstract
Introduction. 01. M1 Algebra. 1.1 M1 is a commutative Banach algobra. 1.2. Translations on M1. 1.3. Convolution. 1.4. Fourier transform on M1. 1.5. Approximate identity in M1. 1.6. Boundod linear functionals in M1 0.2 Wiener's Tauborian Theorem. 2.1. Closed idoals in M1. 2.2. Wiener's closure theorom. Roference.