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Math History
Far more interesting than one might first expect, the history of mathematics is filled with bitter rivalries, political machinations, and incredible innovations by some of the most amazing minds in history. Post all questions concerning individual mathematicians, the development of mathematical theories, and the sociological impact that resulted into this category.
3,988 Questions
What date did Johannes Kepler discover ellipses?
Kepler did not discover ellipses. In 1605 he discovered that the orbits of the planets were ellipses rather than perfect circles.
What is an example of a function?
Functions basically establish relationships between expressions. Many common Algebraic functions are expressed as functions of x:
f(x) = x2 + 4
Which could also be written as y = x2 + 4
However, this just scratches the tip of the universe. Not only do mathematical functions vary in complexity and offer an infinite number of possibilities, there are also programming functions. Programming functions are typically groups of commands that accept one or more parameters, then return one or more pieces of information.
The above Mathematical function can be re-written as a Perl programming function that accepts a value for x:
sub calculateFunction {
my ($x) = @_;
my $y = x**2 + 4;
return ($y);
}
What is something divided by someithing equals 15?
There are an infinite number of solutions for the equation x/y = 15.
One example is;
60/4=15
Have you ever had Neuro Behcets?
Yes, I've been diagnosed in the last year. I am currently recovering from a stroke caused by neuro Behcets and trying to learn more about how it's affecting me. I am NON-typical in that I am a 47 year old Ameican White female with symptons that started about 8 years ago with iritis, lymph node & joint pain. I didn't have any mouth lesions (they were more like brief blisters) until last fall. That was the clue that finally brought a conclusion to my mystery disease. Diane
How do you interpret a KSL or Kolmogorov-Smirnov-Lilliefors test?
If the test result is significant (Lower than or equal to 0.05) = The data is not normally distributed...
If the test result is not significant (Higher than 0.05) = The data is normally distributed...
This synchronize with the Statistical Hypothesis Assumption (Ho and Ha)
Ho means "Nothing Happen" and Ha means "Something Happen" then for
KSL and Shapiro Wilk test of normality assumption also.... If the test result reject Ha and accept Ho means "NOTHING HAPPEN" to data or the data is normally distributed
but if the result reject Ho and accept Ha means "SOMETHING HAPPEN" to data or in this case the data is NOT normally distributed.
Dr.Tanarat Thiengkamol
(send2nude@gmail.com)
How do you read a ruler to the proper number of significant figures?
A ruler or scale should not be read to less than the smallest graduation. In practice, in-between measurements can be estimated but they are not significant.
