Reputation
Next privilege 250 Rep.
View close votes
Badges
5
Newest
 Caucus
Impact
~7k people reached

  • 0 posts edited
  • 0 helpful flags
  • 21 votes cast
Mar
8
comment What is a square root?
MXYMXY, the definition from Wikipedia is fine. Square root is a relation but it's not a function, that is, it is not a functional relation. That's why it cannot be described as the undoing of squaring. Squaring is a function but it is not invertible. (I think you mean inverting when you talk about reversing.) This doesn't invalidate your code. It merely suggests more caution in the description of taking the square root.
Mar
7
comment What is a square root?
@MSYMXY, If you take the view that the square root is a function (or an operation), as I do, then there can only be a single element from the co-domain for any given element of the domain. (Expressed differently, there can only be one output for any input.) Am I missing something?
Mar
7
comment What is a square root?
It is not quite true that a square root is the undoing of the operation of squaring. The reason is that squaring is not an invertible function. (-5)^2 = 25 but the square root of 25 is +5.
Sep
5
comment How many steps would it take at least to create a chessboard?
I don't understand why this question migrated from Mathematica's site. It seems to belong there.
May
13
awarded  Caucus
Jan
4
comment Is mathematics the only language that is not subject of interpretation?
You can think of the first point of view as one captured in the following statement:"mathematics" is a body of knowledge that would exist even if there were no people. The second point of view can be summarized, although only roughly, by the statement that mathematics is a body of knowledge that does not exist without people. These points of view often go by other names such as Platonism and (social) constructivism, but it's better to avoid such labels because they are subject to varying interpretations and would require much space to pin down.
Jan
4
comment Is mathematics the only language that is not subject of interpretation?
@Feral Regarding your second point, in the present context, the terms "perspective" and "approach" are not terms of art with well-defined and agreed upon meanings. Nonetheless, you can think of a "perspective" as a way of looking at or understanding something, in this case, mathematics. An approach (to mathematics) is a characteristic way of dealing with situations involving mathematics. In mathematics education, both are invariably in play, and they may be hard to distinguish in practice.
Nov
23
comment reducing a number with fractions
Do you mean you want to convert a "terminating" decimal number to a fraction?
Nov
23
answered Is mathematics the only language that is not subject of interpretation?
Oct
31
awarded  Supporter
Sep
5
revised How can I prove that all rational numbers are either terminally real or repeating real numbers?
added 209 characters in body
Sep
5
answered How can I prove that all rational numbers are either terminally real or repeating real numbers?
Mar
30
answered Does repeated activity increase the probability of a specific event happening?
Mar
25
awarded  Editor
Mar
25
revised Ratio of division
added 53 characters in body
Mar
25
awarded  Teacher
Mar
25
answered Ratio of division
Feb
28
awarded  Autobiographer