Christian Gustav Adolph Mayer (February 15, 1839 – April 11, 1908) was a German mathematician.Mayer was born on February 15, 1839 in Leipzig, Germany. His father was a businessman from Leipzig. He studied at the University of Leipzig, University of Göttingen, University of Heidelberg and University of Königsberg. He completed his doctorate from the University of Heidelberg in 1861.When Mayer was studying at Heidelberg, he submitted his habilitation thesis to the University of Heidelberg.