Optimization theory and practice by Forst, Wilhelm, Hoffmann, Dieter

It's a nonlinear world by Enns, Richard H.

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Introduction to boolean algebras by Givant, Steven R.

Applied linear algebra and matrix analysis by Shores, Thomas S.

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Notes on set theory by Moschovakis, Yiannis N.

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Notes on set theory by Moschovakis, Yiannis N.

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A field guide to algebra by Chambert-Loir, Antoine

Undergraduate algebra by Lang, Serge 1927-

Applied partial differential equations by Logan, J. David (John David)

Introduction to cryptography by Buchmann, Johannes