В свободном доступе имеется ряд книг по математике

The following items are available as free downloads:

All have been judged to meet the evaluation criteria set by the Editorial  Board

of the American Institute of Mathematics in connection with the Institute's Open

Textbook Initiative. http://www.aimath.org/textbooks/

ELEMENTARY DIFFERENTIAL EQUATIONS

http://digitalcommons.trinity.edu/mono/8/

previously published by  Brooks/Cole  Thomson Learning, 2000.

ELEMENTARY DIFFERENTIAL EQUATIONS WITH BOUNDARY VALUE PROBLEMS,

http://digitalcommons.trinity.edu/mono/9/

previously published by  Brooks/Cole  Thomson Learning, 2000.

STUDENT SOLUTIONS MANUAL FOR ELEMENTARY DIFFERENTIAL EQUATIONS AND

ELEMENTARY DIFFERENTIAL EQUATIONS WITH BOUNDARY VALUE PROBLEMS

http://digitalcommons.trinity.edu/mono/10/

previously published by Brooks/Cole Thomson Learning, 2000.

INTRODUCTION TO REAL ANALYSIS

http://digitalcommons.trinity.edu/mono/7/

previously published by Pearson Education, 2003.

Supplements to INTRODUCTION TO REAL ANALYSIS:

FUNCTIONS DEFINED BY IMPROPER INTEGRALS

http://digitalcommons.trinity.edu/mono/7/

previously published by Harper & Row, 1978.

THE METHOD OF LAGRANGE MULTIPLIERS,

http://digitalcommons.trinity.edu/mono/7/

previously published by Harper & Row, 1978.

The LaTeX source code and graphics files for the the first three items

can be downloaded from

http://digitalcommons.trinity.edu/mono/8/ or

http://digitalcommons.trinity.edu/mono/9/.

The LaTeX source code and graphics files for the the last three items

can be downloaded from

http://digitalcommons.trinity.edu/mono/7/.

Instructor's solutions manuals are  available on request, subject  to

verification of faculty status.

Please forward this message to colleagues, friends, and students who may be

interested.

William F. Trench

Andrew G. Cowles Distinguished Professor Emeritus

Mathematics Department

Trinity University

wtrench@trinity.edu, wtrench@gmail.edu

http://ramanujan.math.trinity.edu/wtrench/index.shtml