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Proof that Open balls are Open sets

235 ratings | 24722 views
In this video we prove that open balls are open sets.
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Text Comments (18)
flnhr (4 months ago)
Bobbi Star (11 months ago)
I had blind math analysis professor. This is great
ankur patil (1 year ago)
nice explanation with figures...
good explanations has give me confidence in functional analysis.
Tegan (1 year ago)
Amazing explanation
martin kioko (1 year ago)
you look cute,,where do you study
vinivinix (1 year ago)
But is a ball just a kind of set though? So an open ball obviously is an open set.
Samia Ben Mhenni (1 year ago)
thank you !
prasanna 17 (2 years ago)
great explanation....very useful..thank u sir
Hamisi Wenge (2 years ago)
great explanation vry helpful thanks much
John Q (2 years ago)
i can't believe this video has got only about 2k views. Such a great explanation! Greeting from Astana, Kazakhstan!
Rawiyah Alraddadi (2 years ago)
goofydog07 (3 years ago)
Even though you talk a bit like a rambler this is really helpful and clear thanks.
Pyan Amin (3 years ago)
awesome, thank you for such big help!
Marcus Fenix (3 years ago)
Very helpful thank you. Have you posted any videos showing that R^n is an open set?
Darrell McPhail (1 year ago)
Let x be any element of R^n. Then B(x, r) is contained in R^n (no matter what the value of r > 0 is.) Hence R^n is open.
Tyrone Dass (3 years ago)
what about Sobolev space any lecture on these
Ouqassou Souhayl (3 years ago)
Thank you for your videos sir, they are well explained, and please keep it on, you are really of a big help :)

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