... perfectly ... a ... sphere? ... the ... the ... Hello Peter, It is actually simpler on a torus than on a sphere. If we think of the torus as the square...
Greetings I am inventor with a new kinetic battery design that has proven difficult to model mathmatically. This is a device that converts electricity into...
Does it need to be Excel? Excel is a horrible tool for this, because of the limitations here in this problem. I once built a VBScript that, for long...
One more question - does it have to be programmatically solved? By inspection, the answer is 0 - no CPUs wasted. Just calories. Throwing common sense at...
Hi, You can download xnumbers add on for Excel to give you the precision needed. This keeps you in Excel. Google Search for Excel muitiprecision. It is a...
Hi, I was musing over the n-th root of n this morning wondering about its properties etc.The natural thing to consider when dealing with powers is to take the...
... I discovered this while playing with my calculator aged 14. and it's even easier with logs to base 10 (which I had memorised) if the root is an adjusted...
This is related to my last post involving centroids. I found that the geometric construction of the centroid of n points in a plane involves the prime factors...
Hi Casting out is used in following example . I found it works only with 19 . any opinion? 1x19=19 1x19=1+0 19=1/1 19=1 1+9=1 10=1 1+0=1 1=1 2x19=38 2x19=3+8 ...
... Another interesting consequence of this experimental math is an easy way to compute an approximation of the prime counting function Pi(n) on a calculator...
Suppose you have a polynomial p(x)=sum_{i=0}^n a_i x^i, the polynomial multiplied by itself is [p(x)]^2=sum_{i=0}^2n b_i x^i where b_i=sum_ {j=0}^i a_j...
... Also, what kind of math deals with ... I suspect false mathematics?? multiplication is distributive over addition/subtraction. a*(b+c) = ab+ac or a*(b-c)...
This is a problem in topology: Prove that the interior of a set A is open, where A is a set in metric space. Solution: We denote interior of set A as int(A). ...
... metric space. ... point, there exists an open ball ... want to show that B(p,r) is ... open ball B(q,r') [centered at ... be entirely in A, and q is an ......
... No, I'm thinking of distributive. Suppose you have a sequence of complex numbers {a_n} where n is an integer. Suppose you have a sequence operator...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the mathforfun group. File :...
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You have a 10" dia sphere...weighs 10 LBS..I need to know what size drill to drill it all the way thru to make it weigh 9 lbs with a hole 1" off center...any...
... hole ... Hard to calculate except approximately. Let a=1 and b be the offset and radius of the hole. The volume of the sphere is (4/3)pi R^3 = 523.6 so you...
Keep in mind the curve on top and bottom of the cylinder,,,it is not a standard cylinder... ... From: video_ranger To: mathforfun@yahoogroups.com Sent:...
... The figures given here are to one significant figure. How precise did you want the answer to be? Perhaps you really meant 10.000000" , 10.000000 lbs and...
Assuming it's a practical (rather than theoretical) problem, approximating the volume of the hole (where a=offset of center,b=radius): V ~ sqrt(R^2 - a^2 -...
yes lets go with a 5 place decimal ... From: video_ranger To: mathforfun@yahoogroups.com Sent: Wednesday, August 27, 2008 10:06 AM Subject: [MATH for FUN] Re:...
Err, Iv been curious about where do all of you study in? With all these briliant mathematical knowledges. Do you study mathematics? Where? I am a student of...
Hello Everyone brave enough to tackle this:if I have: N competitors (N-1 competitors for 1 competitor to compete against) X sudoku puzzles 1 competition...
Determine whether the given sets are open, closed, neither open nor closed, or both open and closed. 1. the union of all the closed intervals [-1+1/n, 1-1/n],...
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