Starting from the Einstein equation in general relativity, we carefully derive the Einstein constraint equations which specify initial data for the Cauchy problem for the Einstein equation. Then, we show how to use the conformal method to study these constraint equations.

}, isbn = {978-981-3100-54-1 }, issn = {978-981-3100-54-1 }, doi = {10.1142/9789813100558_0003}, url = {http://www.worldscientific.com/doi/abs/10.1142/9789813100558_0003}, author = {Ng{\^o}, Quốc Anh} }