TY - BOOK AU - Szeftel,Jeremie TI - Parametrix for wave equations on a rough background: I Regularity of the phase at initial time , II Construction and control at initial time T2 - Asterisque SN - 97828562999777 U1 - 530.11 23 PY - 2023/// CY - Paris PB - Societe Mathematique De France KW - Einstein Equations KW - Homogeneous Wave Equations KW - Mean Curvature Flow KW - Rough Solutions KW - Parametrix KW - Fourier Integral Operator N1 - Includes bibliography and index; Part I. Regularity of the phase at initial time -- Part II. Construction and control at initial time -- Proof of Lemma ER -