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Does anyone have a pdf for the solutions manual for Thomas Sibley's Foundations of Mathematics? Taking a proofs class now and it would be much appreciated.

What are some of the very difficult problems you think no one will ever solve? Obviously there are the famous ones. I don't think anyone will ever be able to solve the pythaogrean theorem. I also don't think anyone will ever prove the triple riemann sum hypothesis. What do you think?

I've invented a new notation for the solution of certain differential equations. Here A is a matrix and x is a vector. It will spread like wildfire. In a year or two, it will be standard. I am legend.

I'm trying to use Cavalieri's principle to derive the volume of a sphere to understand how the area from a 2D circle goes from pi(r^2) to (1/6)pi(D^3) for the volume of a sphere. So far I'm pretty sure I understand what's happening, but this< part(surrounded in blue digital ink) is still beyond my grasp. Could someone draw me a map explaining what that part is trying to say. I think the reason I'm not understanding it is because it seems weird to me that(taking the 3D example into 2D) the area left by the triangle(2D cone) on a square(2D cylinder) is equal to the half area of a circle(2D sphere). Please help.

Hey sci, you guys seem to know math. Wolfram Alpha is telling me this limit is -3/2. My professor says its negative infinity because e is moved to the numerator from having a negative exponent. Who is right?

can I get different isotopes of hydrogen through electrolysis if so what are the processes I need to do I specifically need tritium and deuterium

Here's a question /sci/. What is the sum of all single digit factors from 1 to 100? ex. 1-5 1=1 2=1,2, 3=1,3, 4=1,2,4, 5=1,5 all single digit factors in this equal 21. now what would be 1 to 100?

hey, need to determine the conjugate, modulus and arguments of these functions, I think it's easy, but have no idea how to make it, can you help me? Not only the answer, but how to make it

Basically, the first time you ever found out something in math that actually made you want to do more math. Pic related. >Fucking around on calculator in calc I >realize the nth root of any number n is always less than ~1.445 but more than 1 >As n approaches +1 or +infinity, nth root of n approaches 1 >highest possible value of nth root of n (~1.445), is at n=e >god fucking damnit math

if you could identify this without googling or rev. image searching, I would buy you a steak dinner. You would never guess it. I dare to say its impossible to guess. This is a real photo.

Why are the majority of rapists, in all cultures, men? Are there any scientific reasons (even if it includes the dreck of evopsy) for this? No troll, just legitimately curious.

Looking for high functioning aspies, engineers and scientists that are interested in dedicating their lives to research in a self-sustaining town. The idea is to get 1,000 people willing to pitch at least $15,000 each toward a self-sustaining town in rural Maine dedicated to scientific research in all this would be at the minimum be enough for 4 square miles of land, a 10MW solar plant to power the town and sell back into the grid for property taxes, year-round sunken greenhouses to grow our own food, labs for biotech, computing, physics, materials sciences and fabrication, electric-powered construction equipment and1,000 1,200 sqft sunken homes. Some people have expressed an interest in putting more money into the project in exchange for larger homes, lab accomodations or other things - everything is negotiable within reason, if the goal is exceeded by a wide enough margin we would be purchasing around 25 square miles (the area we are looking at goes for about $600/acre) inclusive of a hydroelectric dam for additional electricity. If you are interested or would like to discuss the idea in detail visit us in our IRC channel #polmaine at irc.freenode.net

Curious if there is a way to make a home made UV detector in a relatively cheap way,what do you say /sci? I've been busy with furnishing one of my cabinet's cells with UV-C lights, and it seems i've succeded to make it mostly leakproof, still feeling the stress when the lights are on, since the light does cause cancer/blind directly. So im wondering if i can make a home made uv detector tool that would alarm me when there is a leak. Its a disinfection box for my shoes btw.

I'm new to programming and I'm having trouble. It's an easy problem, but I really need some help on this one. My assignment is to create a "translator" for numberes represented by symbols into base 10 and then be able to convert that number into whatever base the user wants to put it in. I understand how to do the second and part, but the first one is really got me stumped. Can any of you help me?

Any chemistryfags here? >potassium permanganate solution is standardized by dissolving .9234 g of sodium oxalate in dilute sulfuric acid, then titrating with potassium permanganate solution >principle products are manganese (II) ion and carbon dioxide gas >18.55 mL of potassium permanganate is needed to reach the endpoint I have no idea what's going on here but a need to balance the equation/the redox reaction to find a specific ratio to use in latter part of the problem. I hear it's going to be 2:5 with the sodium having the 5 but I have no idea how to get there.

What does the lowercase theta " is an element of" capital theta mean? I was searching for information on Akaike’s Information Criterion and found a nice presentation, but I can't get very far since I'm not familiar with the notation.

What is this water doing to my plastic pitcher? These bubbles keep forming on the inside. After a few days, the water begins to taste like toothpicks. The water was taken from a 'filtered' water bottle refiller in Minneapolis. I've tried water from several different refillers and it always has the same effect.

I am looking for mindblowing or otherwise amazing chemistry reactions. Post your favorites.

How much time on earth would go by if I traveled at the speed of light for 1 year?

Ok so my teacher said that you NEED physics in order to understand biology. How true is this? What parts of physics do you need to be able to understand biology?