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Introduction to Real Analysis. K.VIMALA DEPARTMENT OF MATHEMATICS. Continuous Functions. Definition 4.2.1. Let E be a subset of R and f a real-valued function with domain E, that is, f : E R. The function f is continuous at a point p in E, if
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Introduction to Real Analysis K.VIMALA DEPARTMENT OF MATHEMATICS
Continuous Functions • Definition 4.2.1. Let E be a subset of R and f a real-valued function with domain E, that is, f : ER. The function f is continuous at a point p in E, if The function f is continuous on E if and only if f is continuous at every point of E.
Continuous Functions • Remark. The function f is continuous at a point p in E if and only if
Make Continuous Functions From Old Ones • Theorem 4.2.3. Let E be a subset of R and f and g are real-valued functions with domain E, that is, f : ER, g : ER. Assume both functions f and g are continuous at a point p in E, then
Make Continuous Functions From Old Ones • Theorem 4.2.4.
Topological Characterization of Continuity • Theorem 4.2.6.
Continuity and Compactness • Theorem 4.2.8. • Corollary 4.2.9.
Intermediate Value Theorem (IVT) • Theorem 4.2.11 (IVT). • Corollary 4.2.12.
Intermediate Value Theorem (IVT) • Corollary 4.2.13 • Corollary 4.2.14 (A fixed point).