Recent content by esun

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proving something in NP

My point is, if you prove that verification cannot be done in polynomial time, then the problem is not in NP. It doesn't matter if P=NP (your "Assuming P != NP" statement isn't required).
- esun
- Post #6
- Apr 6, 2014
- Forum: Ask a Technical Professional
E
proving something in NP

If you can prove that it cannot be verified in polynomial time then that would show the problem is not in NP. This is regardless of whether P=NP. Remember that P is the set of decision problems that can be solved in polynomial time while NP is the set of problems whose solutions can be...
- esun
- Post #4
- Apr 5, 2014
- Forum: Ask a Technical Professional
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proving something in NP

No, the solution has to be verifiable in polynomial time. I wrote a long post about P vs NP awhile ago, I'll just link it here: http://forums.anandtech.com/showpost.php?p=30874851&postcount=5
- esun
- Post #2
- Apr 1, 2014
- Forum: Ask a Technical Professional
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Detecting spread spectrum

Well detecting it is just a matter of having a receiver sensitive enough to see the spread signal. For example if you point a big enough dish at a GPS satellite you'll be able to see the chips being sent down directly (while normally you'd just see noise from a small antenna). Of course if the...
- esun
- Post #3
- Jan 7, 2014
- Forum: Ask a Technical Professional
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Unfamiliar with selling stock and taxes implications...

Taking that section bit by bit: You have no tax liability from buying the stock. (This differs from other stock transactions where if you purchase the stock below the fair market value, you are taxed on the difference as income.) You have to wait 2 years + 1 day after your enrollment date...
- esun
- Post #6
- Jan 5, 2014
- Forum: OT Discussion Club
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Trellis Modulation

I haven't studied TCM but this looks like a good read on it: http://complextoreal.com/wp-content/uploads/2013/01/tcm.pdf It looks like TCM isn't a particularly simple modulation scheme so it may not be reasonable to expect a simple analogy for it (or at least not an accurate one).
- esun
- Post #3
- Jan 5, 2014
- Forum: Ask a Technical Professional
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Did I pull a jaw muscle?

I've had similar pain before, I figured it was a TMJ problem but never bothered get it checked out. Went away after a week or so. Hurts a lot when you eat in the meantime, though, so take NSAIDs as necessary.
- esun
- Post #9
- Nov 21, 2013
- Forum: OT Discussion Club
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Instead of emailing 100 people using "BCC", is there a service that emails indiv?

Look up mail merge. There are many such options (I use https://code.google.com/p/valmerge/).
- esun
- Post #2
- Nov 6, 2013
- Forum: Ask a Technical Professional
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How to identify RAM chips on PCB?**How do you line these things up????**

Probably your best bet will be to Google whatever markings you can see on the chip. If you can't see any markings or Google turns up nothing, you're probably not going to get far.
- esun
- Post #3
- Aug 14, 2013
- Forum: Ask a Technical Professional
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Binary search question...

I tried this out and it worked fine (made a python version). So we have: A = [2, 4, 6, 8, 10, 12] key = 5 imin = 0 imax = 5 So let's go through the iterations (just going to print imin, imax, imid on each iteration, where imid = (imin + imax)/2): 0 5 2 0 1 0 1 1 1 key not found...
- esun
- Post #7
- Aug 10, 2013
- Forum: Programming
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Occupation Thread

Job: Software engineer Dream job: Teacher of some type. Was a TA in college and enjoyed it thoroughly, helping people is the most satisfying thing. Unfortunately it doesn't pay well.
- esun
- Post #94
- Aug 4, 2013
- Forum: OT Discussion Club
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Is coding hard for you?

Again this is so vague. If you're completely lost then you need to start from square one. Do you know what a variable is? Do you understand data types? Flow control? Functions? You really need to be conversant in the syntax of a language before you can go anywhere (e.g., understanding a binary...
- esun
- Post #25
- Aug 3, 2013
- Forum: Programming
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Is coding hard for you?

Your question is too vague. Are you having trouble understanding the algorithms or data structures that you're writing? Or do you understand the algorithms and data structures, but do you not understand how to translate them into code? If it's the former, then that's hard. If it's the latter...
- esun
- Post #21
- Aug 3, 2013
- Forum: Programming
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Pacific Rim....worthy? or not?

I stand corrected, yes I also felt this was extremely dumb (the analog thing bothered me more perhaps since it was actually attempting to be technical while failing miserably). The wall wouldn't have been so bad if they'd done it the right way by walling up the fissure itself (say by turning the...
- esun
- Post #94
- Jul 15, 2013
- Forum: OT Discussion Club
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Pacific Rim....worthy? or not?

I saw this yesterday, overall it was good for a mindless summer action flick. The acting is nothing special, but it isn't cringe-worthy (as in, say, Transformers), and the action and special effects are top notch. Plenty of the usual cliches (scene at the end when the hero's pod opens, scene...
- esun
- Post #78
- Jul 14, 2013
- Forum: OT Discussion Club

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