How did Rudin come up with this exact expression?
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Choice of $q$ in Baby Rudin's Example 1.1
140990
Could anyone explain to me how did we get this result? This is simple example but I'm struggling with little o notation in general.
125734
Has anyone talked themselves into understanding Euler's identity a bit?
103032
Development of the Idea of the Determinant
135302
Proof on Euler totient function
82443
Question about series rearrangement in Baby Rudin (theorem 3.54).
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Fixed point, union of $\aleph_0, \aleph_{\aleph_0},\aleph_{\aleph_{\aleph_0}}\dots$ [see Noah's comment on notation]
138199
Proof explanation $A\setminus B = A \setminus B \cap A$
50804
It seems obvious, but how to prove it formally?
101202
Infinite Geometric Series Formula Derivation
29717
Not sure how to go about this group theory proof
41648
The Intuition behind l'Hopitals Rule
16442
Is this correct for Rudin exercise 3.7? Prove the series is convergent
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Prob. 6 (d), Chap. 1, in Baby Rudin, 3rd ed: How to complete this proof?
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Could someone make the proof into a hinted exercise?
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Why is the formula for calculating euler totient true?
12648
Did I correctly derive this recurrence equation formula