Lyryx Learning was born within the Department of Mathematics & Statistics at the University of Calgary. Mathematics is a passion at Lyryx, and we are proud to provide high quality OER to support mathematics education. Our open textbooks in mathematics are based on the work of respected mathematicians and incorporate numerous additional contributions with editorial oversight. Examples, illustrations, applications, and theorems with proofs are highlighted throughout the textbooks, which also feature robust exercises and select solutions to support conceptual understanding. Mathematics is a fairly universal language so our open texts can be used in Canada, the United States and beyond.