Books like Analysis I by Serge Lang

A comprehensive bridge from elementary calculus to advanced real and complex function theory, this textbook introduces the abstract reasoning characteristic of modern mathematical analysis.

As the title implies, this is an introductory text on mathematical analysis. It focuses on the logical basis of particular math topics which nowadays (as of 2012) are typically featured in a pre-calculus text. The 1967 teacher's edition is accessible to anyone who understands basic algebra. It is designed to prepare students to approach math in a methodical and rigorous manner from an elementary level. Some of the topics are outdated--it includes log and other tables. Although it is an elementary text, the approach used by the authors was meant to introduce logical rigor into high-school mathematics. The lessons are concerned with structure; some of the methods are quite out of favor now that electronic calculators are ubiquitous. This is the sort of math that a student ought to be able to appreciate without a calculator, i.e., it is more concerned with logical structure and proof (at least by the authors' standards) than with memorization of axioms without proof, backed by blind faith in calculators. At the time the text was first written there were no handheld calculators, so elegant algorithms were in demand. The text was designed to teach students how to construct algorithms based on mathematical reasoning. The one exception would be the inclusion of various log, trig, and other tables in the back that were probably computer generated, the algorithms for which were slightly beyond the scope of the text.

A Beginners choice for learning Real Analysis.

The first part of the book covers the basic material of complex analysis, and the second covers many special topics, such as the Riemann Mapping Theorem, the gamma function, and analytic continuation. Power series methods are used more systematically than in other texts, and the proofs using these methods often shed more light on the results than the standard proofs do. The first part of Complex Analysis is suitable for an introductory course on the undergraduate level, and the additional topics covered in the second part give the instructor of a graduate course a great deal of flexibility in structuring a more advanced course.

Real Analysis is designed for a basic graduate course in real analysis. This textbook covers the fundamentals of measure and integration theory, and of functional analysis. The author has incorporated the suggestions of users of the first edition to make this an even more useful textbook for beginning graduate students. This second edition contains many more exercises than the first, including concrete applications of the general theory. As well as the pedagogic treatment of basic material, some topics are treated at a more advanced level, including the spectral theory for unbounded operators, the law of large numbers, and Stokes's Theorem on manifolds. This advanced material also makes the book useful as a reference source. --back cover

Ben shu zhu yao fen san bu fen:di yi bu fen wei shi bian han shu lun, Di er bu fen wei chou xiang kong jian, Di san bu fen wei yi ban ce du yu ji fen lun.