Interactive Real Analysis
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Real Analysis
1. Sets and Relations
2. Infinity and Induction
3. Sequences of Numbers
4. Series of Numbers
5. Topology
6. Limits, Continuity, and Differentiation
7. The Integral
7.1. Riemann Integral
7.2. Integration Techniques
7.3. Measures
7.4. Lebesgue Integral
7.5. Riemann versus Lebesgue
8. Sequences of Functions
9. Historical Tidbits
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7.1. Riemann Integral
Definition 7.1.8: The Riemann Integral
Suppose
f
is a bounded function defined on a closed, bounded interval
. Define the
upper
and
lower
Riemann integrals, respectively, as
I
*
(f) = inf{ U(f,P): P a partition of [a, b]}
I
*
(f) = sup{ L(f,P): P a partition of [a, b]}
Then if
I
*
(f) = I
*
(f)
the function
f
is called
Riemann integrable
and the Riemann integral of
f
over the interval
[a, b]
is denoted by
f(x) dx
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