Desvl's newsletter

By Desvl

Sharing and talking about my blog posts on mathematics. Would be happy if my post helps at any time. If you subscribe, please check your email setting to make sure that emails from desvl_@getrevue.com are not flagged as promotion or spam.

Previous issues

Blog update - On the ring R[cos x, sin x]

#19 Jul 14, 2021

Blog update - Elementary Properties of Cesàro Operator in L^2

#18 Jul 12, 2021

Blog update - Left shift semigroup and further properties

#17 May 26, 2021

#16

May 11, 2021

关于检索数学学习资料的一些想法 – 前言这并不是什么“超全列表”、“超详细指南”。写这种东西可能有很多人收藏，但我很有自信说，会实际用的人不超过百分之一。这和Github上的“awesome”列表性质一样。收集那么多awesome-xxx
#15

May 10, 2021

New Blog Post - Uniqueness of Hamburger Moment Problem (Carleman's condition) using Operator Theory – Apology for not posting what I promised last time. That proof is quite long and I don't have time to
#14

May 8, 2021

My recent thoughts on productivity and to-do list things. – They are overrated. Indeed, when things are out of hands easily, it is a good idea to get organised t
#13

Apr 29, 2021

Quitting Twitter Has Been a Great Decision – When I started doing this, I think I lost a lot of contact to other people, and suffered from withdra
#12

Mar 30, 2021

Blog update - Quasi-analytic class – This is a very interesting topic in analysis.
#11

Mar 21, 2021

Update – For privacy reasons, I can't explain what happened, but at the end of the day, I found a good reason
#10

Mar 3, 2021

Blog update - Tensor product of vector spaces (missing in your linear algebra class) – We present the tensor product (mostly the motivation) of vector spaces. You may not find it in your l
#9

Mar 2, 2021

Blog update - Jacobian Determinant in Multivariable Calculus (missing in your linear algebra class) – We present the notorious Jacobian matrix in multivariable calculus in a algebraic way. One doesn't ex
#8

Feb 25, 2021

Blog post update - One more missing content in your linear algebra class – New content was added to my latest blog post. It was about a direct product decomposition of $GL(n,R)
#7

Feb 23, 2021

Desvl's newsletter - Missing Content in Your Linear Algebra Class (Unfinished) – I think it’s quite often that, when you are learning mathematics beyond linear algebra, you are stuck
#6

Feb 18, 2021

Desvl's newsletter - Topology of quotient space (functional analysis) – We present a systematic introduction to quotient space in a topological vector space. You are assumed
#5

Feb 16, 2021

(Survey) What's your "I should've learnt it in linear algebra already" content? – I'm collecting topics to write a blog about this. Let me know your own by replying to this email you
#4

Feb 14, 2021

Desvl's newsletter - The "big three" in functional analysis – There are three fundamental theorems in the field of functional analysis:The Hahn-Banach TheoremThe B
#3

Feb 10, 2021

Desvl's newsletter - Applications of Zorn's lemma – Axiom of Choice is perhaps the second most controversial but also widely (implicitly or explicitly) u
#2

Feb 8, 2021

Blog update - Dedekind's Domain (Elementary Approach) – If you are interested and looking for some examples I recommend the video by Richard E. Borcherds. He
#1

Feb 7, 2021

Blog update - Hardy's Inequality and several proofs – We present an interesting inequality in real analysis which is named after G. H. Hardy. To prove this