| Call number | Item |
| Q | Science (Go to start of category) |
| QA | Mathematics and Computer Science (Go to start of category) |
| QA201 .G55 1915a | ![[Info]](https://onlinebooks.library.upenn.edu/info.gif) A Treatise on the Theory of Invariants, by Oliver E. Glenn |
| QA201 .S95 | Einleitung in die Theorie der Invarianten Linearer Transformationen auf Grund der Vektorenrechnung (only volume published; Braunschweig: F.. Vieweg und Sohn, 1923), by E. Study |
| QA205 .H99 G7 1906a | Grassmann's Space Analysis, by E. W. Hyde (page images at Cornell) |
| QA211.D55 E3 1914a | Elementary Theory of Equations, by Leonard E. Dickson (page images at Cornell) |
| QA211 .T63 1875a | An Elementary Treatise on the Theory of Equations (1875 edition), by I. Todhunter (page images at Cornell) |
| QA211 .U75 | Theory of Equations (New York et al.: McGraw-Hill Book Co., 1948), by J. V. Uspensky (page images at HathiTrust) |
| QA211 .Y73 1843a | Theory and Solution of Algebraical Equations of the Higher Orders, by J. R. Young (page images at Cornell) |
| QA214 .G35 2003 | Galois Groups and Fundamental Groups (2003), ed. by Leila Schneps (PDF files with commentary at msri.org) |
| QA214 .M12 1916a | The Algebraic Theory of Modular Systems, by F. S. Macaulay (page images at Cornell) |
| QA215 .B85 1833a | A Compendious Tract on the Theory and Solution of Cubic and Biquadratic Equations, and of Equations of the Higher Orders, by B. Bridge (page images at Cornell) |
| QA215 .K64 1888a | Lectures on the Ikosahedron and the Solution of Equations of the Fifth Degree, by Felix Klein (page images at Cornell) |
| QA221 .J3 | The Theory of Approximation (American Mathematical Society Colloquium Publications v11; 1930), by Dunham Jackson (page images at HathiTrust) |
| QA221 .W55 2010 | The Design of Approximation Algorithms (electronic prepublication edition, c2011), by David P. Williamson and David Bernard Shmoys (PDF files with commentary at designofapproxalgs.com) |
| QA241 .B4 | An Elementary Investigation of the Theory of Numbers, by Peter Barlow (page images at Cornell) |
| QA241 .C32 | The Theory of Numbers, and Diophantine Analysis (originally published as two books in 1914 and 1915; combined reprint edition New York: Dover Publications, ca. 1959), by R. D. Carmichael (page images at HathiTrust) |
| QA241 .I23 2003 | Mainly Natural Numbers: A Few Elementary Studies on Smarandache Sequences and Other Number Problems, by Henry Ibstedt (PDF at UNM) |
| QA241 .I58 | Integers: Electronic Journal of Combinatorial Number Theory (2000-) (full serial archives) |
| QA241 .M6 | An Introduction to the Theory of Numbers (West Lafayette, IN: The Trillia Group, c1957), by Leo Moser (PDF files with commentary at trillia.com) |
| QA241 .S465 | A Computational Introduction to Number Theory and Algebra, by Victor Shoup (PDF with commentary at shoup.net) |
| QA241 .S76 2011 | Elementary Number Theory: Primes, Congruences, and Secrets (free online edition, 2011), by William A. Stein (PDF with commentary at wstein.org) |
| QA242 .C28 1915a | Diophantine Analysis, by R. D. Carmichael (page images at HathiTrust) |
| QA243 .C23 | De Aequationibus Secundi Gradus Indeterminatis (dissertation in Latin; Berlin: C. Schultzii, ca. 1867), by Georg Cantor (page images at HathiTrust) |
| QA243 .C753 | Quadratic Forms and Their Applications: Proceedings of the Conference on Quadratic Forms and Their Applications July 5-9, 1999, University College Dublin (electronic edition, ca. 2000), ed. by Eva Bayer-Fluckiger, David Lewis, and Andrew Ranicki (PDF in the UK) |
| QA243 .J6 | The Arithmetic Theory of Quadratic Forms (Carus Mathematical Monograph #10; c1950), by Burton W. Jones (page images at HathiTrust) |
| QA244 .D5 | Researches on Waring's Problem (Carnegie Institution of Washington publication #464; 1935), by Leonard E. Dickson (page images at HathiTrust) |