The book collection for Mathematics can be found on the 3rd floor, at call numbers beginning QA:
QA 1-43 General
QA 47-59 Tables
QA 71-90 Instruments and machines
QA 75-76.95 Calculating machines
QA 75.5-76.95 Electronic computers. Computer science
QA 76.75-76.765 Computer software
QA 101-(145) Elementary mathematics. Arithmetic
QA 150-272.5 Algebra
QA 273-280 Probabilities. Mathematical statistics
QA 299.6-433 Analysis
QA 440-699 Geometry. Trigonometry. Topology
QA 801-939 Analytic mechanics