for linear algebra, maybe this one too, along with Axler, and Strang https://minireference.com/ https://minireference.com/ Axler is very mathematical, focusing

for linear algebra, maybe this one too, along with Axler, and Strang https://minireference.com/ https://minireference.com/ Axler is very mathematical, focusing on vector fields in the abstract as opposed to matrices, Savov is what you need to get through engineering school, Strang straddles both also ulaff.net ... more in the realm of, all about matrices, as opposed to pure math