http://cimat.xyz/wp-content/uploads/2021/04/transparent.png00Jean Paul Delaye Arredondohttp://cimat.xyz/wp-content/uploads/2021/04/transparent.pngJean Paul Delaye Arredondo2023-01-09 11:13:042023-01-09 11:13:04Para-Kähler-Einstein 4-manifolds and non-integrable twistor distributions