| Call number | Item |
| Q | Science (Go to start of category) |
| QA | Mathematics and Computer Science (Go to start of category) |
| QA372 .P6 1922 | ![[Info]](https://onlinebooks.library.upenn.edu/info.gif) Differential Equations (New York: John Wiley and Sons, 1922), by H. B. Phillips (PDF at djm.cc) |
| QA374 .D96 | Dynamics of Partial Differential Equations (2004-; all articles more than about 4 years old, and some later articles, free to read) (partial serial archives) |
| QA374 .S56 | Hilbert Space Methods for Partial Differential Equations, by R. E. Showalter (PDF files at ams.org) |
| QA377 .S683 20046 | Existence, Multiplicity, Perturbation, and Concentration Results for a Class of Quasi-Linear Elliptic Problems (EJDE monograph #7, 2006), by Marco Squassina (PDF with commentary at ams.org) |
| QA377 .T5 | Differential Systems (American Mathematical Society Colloquium Publications v21; 1937), by Joseph Miller Thomas (multiple formats at archive.org) |
| QA377 .W36 2004 | Palais-Smale Approaches to Semilinear Elliptic Equations in Unbounded Domains (EJDE monograph #6, 2004), by Hwai-chiuan Wang (PDF with commentary at ams.org) |
| QA377 .W454 | An Introduction to Multigrid Methods, by Pieter Wesseling (PDF files at mgnet.org) |
| QA385 .C18 1903a | Introductory Treatise on Lie's Theory of Finite Continuous Transformation Groups, by John Edward Campbell (page images at Cornell) |
| QA385 .C67 1911a | An Introduction to the Lie Theory of One-Parameter Groups, by Abraham Cohen (page images at Cornell) |
| QA385 .S8 | Linear Transformations In Hilbert Space and Their Applications To Analysis (American Mathematical Society Colloquium Publications v15; 1932), by Marshall H. Stone (multiple formats at archive.org) |
| QA401 .C48 | The Analysis of Linear Systems (New York et al.: McGraw-Hill, c1963), by Wayne H. Chen (page images at HathiTrust) |
| QA401 .L48 | Linear Circuit Analysis (New York et al.: McGraw-Hill Book Co., 1959), by B. James Ley, Samuel G. Lutz, and Charles F. Rehberg (page images at HathiTrust) |
| QA401 .W62 1915 | A Course of Modern Analysis: An Introduction to the General Theory of Infinite Processes and of Analytic Functions; With an Account of The Principal Transcendental Functions (second edition; Cambridge, UK: At the University Press, 1915), by E. T. Whittaker and G. N. Watson (multiple formats at archive.org) |
| QA401 .W68 | Mathematics for the Physical Sciences (c1962), by Herbert S. Wilf (PDF with commentary here at Penn) |
| QA402 .U535 2004 | Unsolved Problems in Mathematical Systems and Control Theory (with problem solutions submitted since first publication in 2004), ed. by Vincent Blondel and Alexandre Megretski (PDF files with commentary at Princeton) |
| QA402.3 .E78 | ESAIM: Control, Optimisation and Calculus of Variations (partial serial archives) |
| QA402.3 .V26 | Lecture Notes on Optimization (electronic edition of "Notes on Optimization", 1998), by Pravin Pratap Varaiya (PDF at Berkeley) |
| QA402.5 .A27 2008 | Optimization Algorithms on Matrix Manifolds (2008), by P.-A. Absil, R. Mahony, and R. Sepulchre (PDF files with commentary at Princeton) |
| QA402.5 .K44 1999 | Iterative Methods for Optimization (Philadelphia: Society for Industrial and Applied Mathematics, c1999), by C. T. Kelley (PDF at siam.org) |
| QA403 .B66 1955 | Harmonic Analysis and the Theory of Probability (Berkeley and Los Angeles: University of California Press, 1955), by S. Bochner (page images at HathiTrust) |
| QA403.5 .H36 2014 | Albert Michelson's Harmonic Analyzer: A Visual Tour of a Nineteenth Century Machine That Performs Fourier Analysis (2014), by Bill Hammack, Steve Kranz, and Bruce Carpenter (PDF with commentary at engineerguy.com) |
| QA404 .J2 1941 | Fourier Series and Orthogonal Polynomials (Carus Mathematical Monograph #6; c1941), by Dunham Jackson (page images at HathiTrust) |
| QA404 .P3 | Fourier Transforms in the Complex Domain (American Mathematical Society Colloquium Publications v19, 1934), by Raymond E. A. C. Paley and Norbert Wiener (multiple formats at archive.org) |
| QA404.5 .B69 | Chebyshev and Fourier Spectral Methods (second edition), by John P. Boyd (PDF with commentary at Citeseer) |
| QA404.5 .S9 1959 | Orthogonal Polynomials (American Mathematical Society Colloquium Publications v23, revised edition; 1959), by Gábor Szegő (page images at HathiTrust) |