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That would depend on who is answering 
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If you would go with open source I have a counter question, how precise must it be... Is double enough or do you need decimal etc.
And how much functionallity do you need?
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double is fine
matrices and vectors
QR, LU, SVD, eigenvalue decompositions
dfft (double and complex, forward and inverse)
(and probably a few others I can't determine quickly...)
I've found ILNumerics, Math .NET, FinMath, Meta.Numerics, IMSL Numerical Libraries (RogueWave).
Interested in experiance/opinions on these as well.
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Yeah, thats quite a list, more than you could easily do yourself. I havent really got a need for all of those functions but there is always Numerical Recipies in C++ and Practicla Numerical Methods in C#, but I dont think they have all that in matrix form?
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I find Math.NET to be the Platinum Standard for .NET math libraries.
Keep Clam And Proofread
--
√(-1) 23 ∑ π...
And it was delicious.
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Thanks!
(And free doesn't hurt!)
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You might want to have a look at:
MaNet: A matrix library for .NET (Rational Computing 2)[^]
I can't compare it Math.Net, (except for to say there's an s missing somewhere).
It doesn't do everything, I seem to remember that it lacks a few things, Kronecker Sum and Direct Sum come to mind (but you'd have to check).
Mike
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Potluck at CodeProject HQ today. Our new contest manager, Kevin Priddle[^], looked the scariest. Check out the pic here[^]. Happy Halloween!
Carrie
Follow CodeProject.TV on Twitter
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So did he get dressed up as a monster just after this?
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Carrie Davis-Sydor wrote: looked the scariest
Kermit the Frog is scarier.
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When I was a little kid, a couple of years ago, we all had to get a polio vaccine shot when we started school. That shot left a distinctive scar on the upper arm that lasts a lifetime. Why?
We got lots of shots; why don't we all have huge, puckered scars all over our butts from the penicillin, and tetanus, and assorted other things they stabbed us with? What made that one shot so different?
Will Rogers never met me.
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Apparently, because it isn't the polio shot: http://boards.straightdope.com/sdmb/showthread.php?t=622394[^] -
Other sites agree: it was the Smallpox vaccine and it left a scar because it was a live virus (Cowpox) rather than a deactivated virus.
Be glad you have it: smallpox was right b*st*rd!
The only instant messaging I do involves my middle finger.
English doesn't borrow from other languages.
English follows other languages down dark alleys, knocks them over and goes through their pockets for loose grammar.
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I believe the proper term is attenuated virus.............if you want to be a jerk about it! 
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Not particularly!
I'm no doctor, but the Smallpox story is just incredible. One of the nastiest diseases we knew of (30% mortality, horrible disfigurement and blindness likely if you survived - very infectious as well.) It's the only disease we have managed to remove completely from the wild via vaccination. It's estimated that over 300 million people died of smallpox in the 20th century, and Edward Jenner probably saved more lives than any other single individual in history!
The only instant messaging I do involves my middle finger.
English doesn't borrow from other languages.
English follows other languages down dark alleys, knocks them over and goes through their pockets for loose grammar.
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Indeed, that is quite a feat for humanity. I know my mother has the scar Roger speaks of.
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I have it as well. It itched like a small bag of fleas had been emptied into your underwear, and you had been fitted with boxing gloves...
The only instant messaging I do involves my middle finger.
English doesn't borrow from other languages.
English follows other languages down dark alleys, knocks them over and goes through their pockets for loose grammar.
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Well, I can't imagine anything more miserable than that.
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I have it too, but it was so long ago I don't recall anything about the event...
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Ah, that would explain it.
Will Rogers never met me.
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We had a TB jab aged 11 that left a scar. It also weeped foul smelling puss for weeks afterwards.
Punching people on the TB jab was quite a game, kids going home and peeling their shirt off their arm.
“I believe that there is an equality to all humanity. We all suck.” Bill Hicks
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We had a multi-jab thing, with a ring of needles.
On me, it blew up like a red balloon, then disappeared altogether -- no scar. The kids that had no reaction all ended up with scars.
I wanna be a eunuchs developer! Pass me a bread knife!
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That was the "BCG" (Bacillus Calmette–Guérin) jab - which was the TB vaccine.
The only instant messaging I do involves my middle finger.
English doesn't borrow from other languages.
English follows other languages down dark alleys, knocks them over and goes through their pockets for loose grammar.
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Well, it must have worked, because, so far as I'm aware, I haven't died of TB.
I wanna be a eunuchs developer! Pass me a bread knife!
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Actually the ring of needles was the test for TB. If it came up then they sent you for a chest x-ray to determine if you were either naturally immune or if you actually had TB. Those that didn't come up needed the jab.
- I would love to change the world, but they won’t give me the source code.
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