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GEdgar

 Discussion on question by Mike: How d…

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GEdgar
Dec 12, 2024 09:32
I recall from long ago ... the textbook Functional Analysis by Frigyes Riesz and Bela Sz.-Nagy, which the instructor called something like "Reese and Nazh"
 

 Discussion on question by goku: Why d…

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GEdgar
Oct 20, 2024 12:41
Perhaps the reason you think "with" is missing in English is that in your own language, something like "with" is needed.
 

 Discussion on answer by JRN: How long…

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GEdgar
Oct 8, 2024 19:32
I agree with the "just one word" part. Example ... Freud used the terms "id", "ego" and "superego".
 

 Discussion on question by Shaun: What…

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GEdgar
Oct 2, 2024 12:34
@MauroALLEGRANZA ... "a statement must be an expression that we can prove". Interesting. Goldbach's Conjecture is not a "statement" because we cannot prove it?
 

 Discussion on question by user284985:…

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GEdgar
Sep 29, 2024 09:49
(a) You never wrote proofs before? (b) This course will work on proof writing? if (a)(b), then you are in the right course! if (a) or (b) is false, then you are in the wrong course.
 

 Discussion on question by phd_cyber_c…

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GEdgar
Jul 26, 2024 18:16
This is in the US? Do you nave certain parts of the US where you refuse to go for a job? (One new PhD I knew applied only for jobs within commuting distance of where he lived.)
 

 Discussion on question by rbaleksanda…

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GEdgar
Jun 3, 2024 16:56
This will depend on the editor who sent the paper for review. The senior researcher can ask the editor whether he can give it to someone else.
 

 Discussion on question by EMS: Is the…

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GEdgar
May 31, 2024 15:54
Perhaps you can call it the Golden Age ... en.wikipedia.org/wiki/Golden_Age
 

 Discussion on question by Sidharth Gh…

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GEdgar
Apr 24, 2024 16:58
Even though an element is named for Marie Curie, it is still not capitalized ... curium . See also francium, germanium, americium, livermorium ...
 

 Discussion on question by Mitsuko: Is…

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GEdgar
Mar 29, 2024 15:34
Pretty soon (already in some cases) Google searches will by default give you AI-generated text answers.
 

 Discussion on question by Max: Prove …

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GEdgar
Feb 12, 2024 13:37
If your professor asked you this, and you cannot do it, then talk to him about it.
GEdgar
Feb 12, 2024 13:37
Even if this is true, I doubt it should be proved by induction.
 

 Discussion on question by free_lancer…

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GEdgar
Jan 23, 2024 01:14
The question is OK, as long as you remove the word "periodic".
GEdgar
Jan 23, 2024 01:14
True, it is not "periodic" in the usual meaning of the word. But what about the question asked: Is it true that for every $(\alpha, \beta)\in (0,1)\times \mathbb{R}$ there exist $\beta^\prime\neq \beta$ such that $\zeta(\alpha + \beta i)= \zeta(\alpha + \beta^\prime i)$?
 

 Discussion on question by oleg_phoros…

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GEdgar
Jan 17, 2024 12:36
Changing the names is probably futile. Note that, even here on math.se, when someone writes $\operatorname{ctg}(\theta)$ for cotangent, they get questions about what it means.
 

 Discussion on question by Luke Nemeth…

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GEdgar
Sep 18, 2023 21:57
No, I am suggesting what I said. This is not a discussion forum, this is not an opinion forum. Good ideas may, indeed, arise from discussion and opinion. But this is not the place for that.
GEdgar
Sep 18, 2023 21:57
This forum is not a discussion forum. Nor is it an opinion forum. So I think this question is off-topic here. A perhaps valid question on this would be: "Have there been published studies on whether a certain order for the topics is more effective for teaching? Or more desirable for some other purpose?"
 

 Discussion on question by JonathanRee…

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GEdgar
Sep 8, 2023 20:25
There are several past questions here about how publishers should react to papers from Iran, because of the past US sanctions on Iran: Does Iran's sanction play a pivotal role in rejecting papers from a journal?
 

 Discussion on question by Circle: Can…

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GEdgar
Aug 24, 2023 08:17
Of course you need to provide a definition of "even", then see if your proposal fits it.
 

 Discussion on question by Alex Johnso…

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GEdgar
Aug 20, 2023 14:26
I would prefer $\frac{1}{x}$. However: for units, instead of $5 \;\text{cm}/\text{s}$ we often see $5 \;\text{cm}\,\text{s}^{-1}$. But that may only be beyond the high school level.
 

 Discussion on question by CfourPiO: A…

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GEdgar
Jun 18, 2023 03:32
I have seen this, even more highbrow: "The sequel is organized as follows..."
 

 Discussion on question by Dreamworld2…

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GEdgar
Mar 24, 2023 17:13
I think showing almost all $f$ have infinitely many zeros is easier than exhibiting one $f$ and showing it has infinitely many zeros.
 

 Discussion on question by Allure: Is …

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GEdgar
Mar 21, 2023 13:35
Is this really a question from an editor? It sounds more like a complaint from a crank whose paper was rejected.
 

 Discussion on question by Franklin: S…

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GEdgar
Mar 16, 2023 19:15
You have $2c_2+\frac {c_0}{x}+c_1 = 0$. Of course $c_0 = 0$. Then you can take $c_1$ as any value at all. Then solve for $c_2$ in terms of $c_1$.
GEdgar
Mar 16, 2023 19:15
It should be in all ODE textbooks.
GEdgar
Mar 16, 2023 19:15
For the first step, solve an indicial equation fo find what the starting index should be. (Because of $x$ in the denominator.) It turns out to be $1$. So attempt $f(x) = \sum_{n=1}^\infty c_nx^n$.
 

 Discussion on question by Someone: Wh…

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GEdgar
Jan 4, 2023 20:32
In this answer of mine, the comment said they were called "scones" in Britain ... english.stackexchange.com/a/416742/9368
 

 Discussion on question by Arunabh Bha…

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GEdgar
Nov 5, 2022 20:36
This is a juvenile dispute.
 

 Discussion on answer by Ray Butterwor…

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GEdgar
Oct 21, 2022 08:33
Theoretically, the number of males and females should be equal at peak childbearing age. For humans, this means more males amung the youngsters and more femails among the seniors. Of course that would be for hunter-gatherer societies: agriculture could have upset this.
 

 Discussion on question by asdadada: Q…

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GEdgar
Sep 30, 2022 16:01
Hint: Assume there is such an $a$. Apply the $\varepsilon, \delta$ definition for $\lim\limits_{x \to 1^-}x$, using $\varepsilon = 1-a$.
GEdgar
Sep 30, 2022 16:01
On the real number system, there is no such $a$. But in other number systems, who knows? First you would have to tell us what number system you are using.
 

 Discussion on question by Pat Dolan: …

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GEdgar
Sep 9, 2022 22:47
You are correct that this is not a discussion forum. This is a question and answer forum.
 

 Discussion on question by copepod: Nu…

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GEdgar
Aug 31, 2022 03:04
A "gross" is a dozen dozens (or 144). Still suggesting base 12.
 

 Discussion on question by riccardoven…

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GEdgar
Aug 21, 2022 21:35
In a question like this, the best "context" would be: what happened when you tried to prove it?
 

 Discussion on question by sqek: Is Qu…

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GEdgar
Jun 4, 2022 13:35
Good question. The higher price is from what? And how does that relate to environmental impact? It is simplistic to think price is correlated to environmental impact.
 

 Discussion on question by AnonymooseU…

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GEdgar
Jun 2, 2022 01:00
The extreme version of "will have" may be written "will've" and then it is called a contraction.
 

 Discussion on question by Remirror: W…

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GEdgar
Apr 6, 2022 09:16
A Stress Analysis of a Strapless Evening Gown and Other Essays for a Scientific Age by Robert A. Baker and Stanley Wyatt (1963). Do I recall correctly that this contains the paper proving that a bumblebee cannot fly?
 

 Discussion on question by AmoebaProte…

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GEdgar
Feb 10, 2022 21:03
It will be best if you re-write your post in sigma notation, saying what you want to say. The "$\dots$" notation is ambiguous. The likely answer to your "How can" questions is that rearranging a series that is not absolutely convergent may produce different values.
 

 Discussion on question by Younes: The…

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GEdgar
Jan 31, 2022 13:15
"I believe I have to explain on a higher level." It seems what you did was on a level too high for your students. So, either do it on a lower level or get better students. Perfect instruction is no good if its level does not fit the students.
 

 Discussion on question by DjinTonic: …

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GEdgar
Dec 21, 2021 19:32
Google "get boostered" to find a lot of matches. Many of them before 2019, so not related to the COVID19 vaccines. For example, canine parovirus: "...and then adult dogs will get boostered every one to three years."
 

 Discussion on question by Frax: Is it…

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GEdgar
Dec 5, 2021 23:33
Are you assuming that $S(i) < \infty$ for all $i$?
 

 Discussion on question by Unbowed Epi…

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GEdgar
Nov 27, 2021 14:46
Another warning feature: Published in the Open Access Library Journal.
 

 Discussion on answer by Jon Custer: H…

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GEdgar
Oct 13, 2021 18:05
@looktook: "Im in shock that mRNA and AZ didnt get." It is to be noted that current Nobel prizes are for work done 1 or 2 decades ago (or more). Maybe mRNA will get the prize 1 or 2 decades in the future! So, for this question: the lack of women Nobel laureates this year reflects the lack of women doing top-level research 1 or 2 decades ago.
 

 Discussion on question by GeekestGeek…

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GEdgar
Jul 2, 2021 22:18
The two dictionaries each have their own editorial boards responsible for their contents. Why should the publisher try to overrule one or the other?
GEdgar
Jul 2, 2021 22:18
Interesting. Lexico has noun zero plural zeros. But verb zero with conjugation zeroes, zeroing, zeroed.
 

 Discussion on question by AvidListene…

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GEdgar
Jun 18, 2021 17:42
Curious graphic. The "Vietnam" arrow points to Korea.
 

 Discussion on question by Nadine: I f…

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GEdgar
Jun 15, 2021 10:00
"conservative in my behaviour" ... and conservative in your dress?
 

 Discussion on question by Tyma Gaidas…

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GEdgar
May 8, 2021 14:57
For most real numbers $x$, the quantity $\sin(\pi/x)$ is transcendental, so has no minimal polynomial at all.
 

 Discussion on question by Matthew Chr…

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GEdgar
Mar 29, 2021 22:43
As far as I know, such questions appear only in "recreational math", which is not (yet) an academic subject.
 

 Discussion on question by hm2020: Inf…

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GEdgar
Feb 20, 2021 17:09
Another example is where you map the zero-dimensional Cantor set onto the one-dimensional interval, by mapping ternary expansion $\sum 2a_k3^{-k}$ into binary expansion $\sum a_k 2^{-k}$. With a differentiable map (more generally a Lipschitz map) the image has dimension ${}\le$ the domain. But not for non-differentiable maps like Peano. Reportedly, Cantor was astounded when he found there was a bijection between $\mathbb R$ and $\mathbb R^2$. If you think there are too many maps in Set, maybe you should go to a category of differentiable maps or something.