Arpad Szaz

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Questions related from Arpad Szaz

Where can I find a proof that the operation given bor(A)=A--int(A) is idempotent?

N. Elez and O. Papaz, [The new operators in topological spaces, Math. Moravica 17 (2013), 63--68] stated this fact without any proof. In the attached pdf, I have been able to worked out...

23 May 2024 6,659 1 View

Can you prove or disprove that in a topological space the set A=C\setminus int(cl(C)) is always meager (nowhere dense)?

Irina Zvina stated the corresponding statement in the proof of Lemma 2.3 [On i-topological spaces: generalization of the concept of a topological space via ideals, Appl. Gen. Top. 7(2006),...

16 January 2024 8,312 11 View

Why are vascular catastrophes more frequent among table tennis players?

Your rigid system did not allow me to formulate my complete question: Why are vascular catastrophes more frequent among table tennis players, than chess or football players? I am not a...

10 December 2023 6,312 0 View

Is there any book containing at least one passage on Volterra spaces?

I could find only one dissertation (by Ballone), and a few papers (not very readable) on Volterra ( spaces. This is a very striking fact, since Volterra spaces are natural generalization of...

22 November 2023 2,668 8 View

Who have forced the Editorial Boards of Mathematical Journals to introduce crazy rigid rules for their possible authors?

The greatest stupidities are the recently introduced Similarity Index and the rule that every Reference Item have to be cited in the Text of the paper. There is also a reqirement for a...

17 November 2023 5,639 3 View

By definition, what is 2/3 ? Is it a set or even a function? How many good answers can be given?

I was testing my students with this question. However, acceptable answers were not given. Two papers of mine help to give the best answer.

16 November 2023 7,091 3 View