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6:28 AM
@MartinSleziak The tag is gone.
 
 
7 hours later…
1:31 PM
0
Q: Is pushdown transduction of a periodic sequence periodic?

Yanior WegLet’s define a pushdown transducer as a 9-tuple $V = (A, B, S, Q_A, Q_S, \phi, \psi, \chi, q_0)$, where $A$ is the finite input alphabet, $B$ is the finite output alphabet, $S$ is the finite stack alphabet, $Q_A$ are the finite set of read-from-input states, $Q_S$ is the finite set of read-from-s...

4
Q: Is the set of pushdown transductions closed under composition?

Yanior WegLet’s define a pushdown transducer as a 9-tuple $V = (A, B, S, Q_A, Q_S, \phi, \psi, \chi, q_0)$, where $A$ is the finite input alphabet, $B$ is the finite output alphabet, $S$ is the finite stack alphabet, $Q_A$ are the finite set of read-from-input states, $Q_S$ is the finite set of read-from-s...

1
Q: Does both the language and its complement being context free imply it being deterministic context-free?

Yanior WegSuppose $L \subset A^*$ is context free and $A^*\setminus L$ is also context free. Does it mean, that $L$ is deterministic context free? If it is not, I would like to see a counterexample (I failed to construct one myself). Note that the converse is true. Moreover, a complement to a determinist...

 
 
1 hour later…
2:58 PM
1
A: Tag management 2021

J. W. Tanner$\textbf{Proposal}:\;$ Create the tag Dot-product There is a tag for cross-product, but not one for dot-product. There is a tag for inner-product-space, but that is more abstract than the usual dot product for $\mathbb R^n$.

Seems like a synonym would be the ideal solution here, redirecting dot-product to inner-product-space But on the other hand this may confuse users who would be the target audience of dot-productAlexander Gruber ♦ yesterday
@AlexanderGruber I agree that a dot-product -> inner-product-space synonym would be ideal. I have edited the inner product space tag wiki in anticipation of such a move (i.e. I have highlighted the dot product a bit more). The goal of the edits was to prevent confusion on the part of "dot product" users. — Xander Henderson ♦ yesterday
The current revision of the tag-excerpt:
> For questions about inner products and inner product spaces, including questions about the dot product. An inner product space is a vector space equipped with an inner product. The dot product (seen in multivariable calculus and linear algebra) is a simple example of an inner product—other inner products may be seen as generalizations of the dot product.
@XanderHenderson For me, the — is displayed — as and not as . So maybe it should be replaced by the — character.
Or is it supposed to work in the tag-excerpt?
 
@MartinSleziak It renders correctly on my end. :\
 
That's interesting.
 
But maybe there is some interaction with ChatJax and the various other scripts I have running which makes it look correct.
I'll change it (if it fails somewhere, it is likely it fails in other places, too).
 
I was about to say that it renders for me correctly in the pop-up and not in the tag-info. But most likely it was because you manage to edit it before I took the second screenshot.
 
Heh. :P
 
3:08 PM
@quid Since I know that you and me are on the opposite sides of the spectrum concerning tag-synonyms and that you opposed some tag synonyms that looked fine to me, I wanted to let you know that the synonym $\to$ is being discussed.
See the post linked above and the comments under that post.
 
 
3 hours later…
5:39 PM
In the theory of computation, a branch of theoretical computer science, a pushdown automaton (PDA) is a type of automaton that employs a stack. Pushdown automata are used in theories about what can be computed by machines. They are more capable than finite-state machines but less capable than Turing machines. Deterministic pushdown automata can recognize all deterministic context-free languages while nondeterministic ones can recognize all context-free languages, with the former often used in parser design. The term "pushdown" refers to the fact that the stack can be regarded as being "pushed...
 
 
3 hours later…
8:49 PM
@MartinSleziak I guess I can live with that one. Though I don't get why the other one needs the "spaces"
I mean "inner-product" or "inner-products" would be just as good.
2
 
I like "inner-products".
 
Perhaps the suggestion to rename this to or could be also mentioned in the comments.
It sounds reasonable, if we want this as a common tag for the more abstract concept and for the usual inner product in $\mathbb R^n$.
 
@MartinSleziak I think that I will post a new answer to the tag management thread which puts forward a concrete proposal for creating and synonymizing tags.
J. W. Tanner's answer seems like the wrong venue.
 
A separate answer would certainly mean more visibility for that suggestion.
 
9:32 PM
0
A: Tag management 2021

Xander HendersonProposal: Rename the inner-product-spaces to inner-products. Create the tag synonym inner-product-spaces $\to$ inner-products. Create the tag synonym dot-product $\to$ inner-products. Create the tag synonym scalar-product $\to$ inner-products. This is related to, but distinct from, J. W. Tanner...

 

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