vitaniarain said:
Do the Eddington-Finkelstein coordinates allow to cover the maximal analytic extension of the Schwarzschild spacetime? ans if not what region do they cover?
Eddington-Finkelstein coordinates cover only half of the maximal analytic extension of Schwarzschild spacetime. Take a look at section 5.1.3 in Eric Poisson's notes,
http://www.physics.uoguelph.ca/poisson/research/agr.pdf.
Better yet, see if your library has a copy of the excellent book, A Relativist's Toolkit: The Mathematics of Black Hole Mechanics, into which the notes evolved.
Ingoing Eddington-Finkelstein coordinates cover half of the maximal analytic extension of the Schwarzschild spacetime, and outgoing Eddington-Finkelstein coordinates cover half of the maximal analytic extension of the Schwarzschild spacetime. Note that:
1) these are two different coordinate systems;
2) they cover different, but overlapping, halves of spacetime;
3) If "Eddington-Finkelstein coordinates" appears without either "ingoing" or "outgoing", than "ingoing" is usually meant;
4) Poisson labels the regions of spacetime differently than does Wald.