| Call number | Item |
| Q | Science (Go to start of category) |
| QA | Mathematics and Computer Science (Go to start of category) |
| QA241 .B4 | ![[Info]](https://onlinebooks.library.upenn.edu/info.gif) 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) |
| QA244 .R3 | The Elements of the Theory of Algebraic Numbers, by Legh Wilber Reid, contrib. by David Hilbert (page images at Cornell) |
| QA246 .B4 | An Arithmetical Theory of Certain Numerical Functions (1915), by Eric Temple Bell (multiple formats at archive.org) |
| QA246.5 .S66 | The On-Line Encyclopedia of Integer Sequences, ed. by N. J. A. Sloane and Simon Plouffe (searchable HTML at oeis.org) |
| QA247 .A5 | Structure of Algebras (American Mathematical Society Colloquium Publications v24, revised printing; 1961), by A. Adrian Albert (page images at HathiTrust; US access only) |
| QA247 .J28 1956 | Structure of Rings (American Mathematical Society Colloquium Publications v37; 1956), by Nathan Jacobson (page images at HathiTrust) |
| QA247 .J46 2002 | Generic Polynomials: Constructive Aspects of the Inverse Galois Problem (2002), ed. by Christian U. Jensen, Arne Ledet, and Noriko Yui (PDF files with commentary at msri.org) |
| QA247 .M2 | Rings and Ideals (Carus Mathematical Monograph #8; c1948), by Neal Henry McCoy (page images at HathiTrust) |
| QA247 .P6 | The Theory of Algebraic Numbers (Carus Mathematical Monograph #9; c1950), by Harry Pollard (page images at HathiTrust) |
| QA247.5 .M28 1906a | Irrational Numbers and Their Representation by Sequences and Series, by Henry Parker Manning (page images at Cornell) |
| QA248 .H8 | The Continuum, and Other Types of Serial Order: With an Introduction to Cantor's Transfinite Numbers (reprint of the 1917 second edition), by E. V. Huntington (PDF at djm.cc) |
| QA248 .K349 2004 | Fuzzy Relational Maps and Neutrosophic Relational Maps, by W. B. Vasantha Kandasamy and Florentin Smarandache (PDF at UNM) |
| QA248 .M6 | Foundations of Point Set Theory (American Mathematical Society Colloquium Publications v13; 1932), by R. L. Moore (page images at HathiTrust) |
| QA248 .S38 | Theorie der Vielfachen Kontinuität (in German; Zurich: Zürcher und Furrer, ca. 1901), by Ludwig Schläfli, ed. by J. H. Graf |