Sunday, February 4, 2024

Digest for comp.lang.c++@googlegroups.com - 5 updates in 2 topics

Bonita Montero <Bonita.Montero@gmail.com>: Feb 04 05:58AM +0100

Am 03.02.2024 um 21:05 schrieb Chris M. Thomasson:
 
> Hummm... You threw me for a loop here... What exactly do you mean? Show
> me a condensed example. Those warnings are there for a reason... You
> really need to model it in a race detector. Relacy is a fun one.
 
The code doesn't need any race detector, the synchronization part is
trivial.
"Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>: Feb 03 09:30PM -0800

On 2/3/2024 8:58 PM, Bonita Montero wrote:
>> You really need to model it in a race detector. Relacy is a fun one.
 
> The code doesn't need any race detector, the synchronization part is
> trivial.
 
What happens if you turn off all of those very important warnings?
Bonita Montero <Bonita.Montero@gmail.com>: Feb 04 07:41AM +0100

Am 04.02.2024 um 06:30 schrieb Chris M. Thomasson:
 
>> The code doesn't need any race detector, the synchronization part is
>> trivial.
 
> What happens if you turn off all of those very important warnings?
 
What a question ...
I get incorrect warnings while compiling.
"Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>: Feb 04 01:59PM -0800

On 2/3/2024 10:41 PM, Bonita Montero wrote:
 
>> What happens if you turn off all of those very important warnings?
 
> What a question ...
> I get incorrect warnings while compiling.
 
Why are they incorrect, according to you? Boil it down to a simple
example where these warnings are incorrect. That way I can reproduce it
on my side.
wij <wyniijj5@gmail.com>: Feb 04 11:11AM +0800

This file is intended a proof that ℙ≠ℕℙ.
https://sourceforge.net/projects/cscall/files/MisFiles/PNP-proof.txt/download
 
-------------
ANPC::= Set of decision problems that additional information c must be
provided
to compute the problem in P-time (including processing the
information c
(certificate)).
 
Since the information c can be generated in O(2^N) time, the upper
bound of
ANPC is O(2^N) (checking c is in P-time).
 
Corollary: ANPC ⊆ ℕℙ (from ℕℙ definition: "... ℕℙ is the set of
decision
problems verifiable in polynomial time by a deterministic Turing
machine. https://en.wikipedia.org/wiki/NP_(complexity)")
 
If we try to prove or show that an ANPC problem can be solved in P-
time, we
would also be trying to prove/show that the requirement of the
additional
information c is not necessary. Thus, such a proof will just prove
itself not a valid proof, IOW, ANPC==P is unprovable.
 
Conclusion: ANPC is not P-time provable/solvable (implied by ANPC
definition)
 
Corollary: ℕℙ!=ℙ (ANPC ⊆ ℕℙ AND ANPC!=ℙ)
 
QED. ------------
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