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blackpenredpen

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0:04:28
Welcoming a math PhD friend at the airport be like! @drpeyam
Wed, 31 Dec 2025 02:20:17 GMT
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0:15:14
How to rigorously prove that a limit is WRONG!
Mon, 08 Dec 2025 14:26:45 GMT
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0:10:31
Can f'(x)=f^-1(x)?
Sun, 30 Nov 2025 02:53:42 GMT
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0:12:45
Simple limit but most students cannot prove it!
Thu, 20 Nov 2025 14:18:26 GMT
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0:07:41
How to find a delta for a specific epsilon (epsilon-delta definition of a limit)
Sun, 16 Nov 2025 13:13:06 GMT
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0:11:39
How to find a formula for delta (epsilon-delta definition of a limit)
Tue, 11 Nov 2025 14:42:09 GMT
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0:22:51
Brilliant Trig Identity Challenge!
Wed, 29 Oct 2025 16:52:39 GMT
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0:08:55
It’s not joke, it’s rigorous enough for physics… 😂
Sat, 27 Sep 2025 12:00:13 GMT
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0:06:56
My first abstract algebra problem in 14 years!
Thu, 18 Sep 2025 11:58:35 GMT
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0:11:41
Why are integrals so hard? Remembering the +C?
Fri, 12 Sep 2025 13:01:29 GMT
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