Introductory Real Analysis, Lecture 6: Bounded Sequences, Monotone Sequences, Limits of Sequences

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Introductory Real Analysis, Lecture 6



(0:00) Recursively defined sequence exhibiting chaotic behavior.
(3:40) Describe the butterfly effect.
(8:29) Definition of a bounded sequence.
(12:56) Definition of a monotone increasing sequence.
(16:21) You should try to come up with a definition of "eventually monotone increasing" on your own.
(17:22) Definition of a limit of a sequence.
(21:48) Limit notation.
(22:55) Scratch work and proof that {3n/(5n+11)} converges to 3/5.
(35:51) Negate the definition of convergence of a sequence and do scratch work for confirming that {3n/(5n+11)} does not converge to 0.60001.
(46:15) Summarize other things: convergent sequences are bounded (with discussion of converse and contrapositive) and the limit of a convergent sequence is unique, discussion of what it means to "diverge to infinity".
(50:17) Prove that the limit of the sum of two convergent sequences exists and is the sum of the individual limits.

Bill Kinney, Bethel University Department of Mathematics and Computer Science. St. Paul, MN.

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These are BRILLIANT! You sure know how to TEACH, which is a quality some professors lack.

tylergonzales
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Awesome lectures, you're clearly passionate about teaching math and engaging your class! Hope more people like you get into Math education :)

vivekkatial
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Great lectures Professor! Super clear and intuitive; Nice supplement for my mediocre lectures back here in New York. Hopefully the course material doesn't "diverge" too much xD Thank you!

Young-xupp
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I almost invented my own contrapositive definition. Thanks for the reminder!

lemyul
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Professor! Tell me am I right ????.... converges means it get close to some real number and diverges means that it doesn't exists means tends to infinity .... bounded means that it doesn't converges not diverges but it is bounded between some real numbers

pinkyrabi
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Professor Please share those cool videos u talk about in your lectures!

ayushigupta
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what is N1 and N2 in the last example?

antonypolydorou
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“Did anyone watch the vsauce videos this weekend” 😂👍🏼

Imperfecto
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I didn't find double sequences and series🙁

lupitalupita