- #1

eNathan

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|5 6 2 0|

|5 0 4 8|

|5 5 7 6|

|8 4 6 1|

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- Thread starter eNathan
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- #1

eNathan

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- #2

TD

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The applications are very different, solving lineair systems is a very common one.

- #3

eNathan

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How do you compute matrix set? I have a question here that asks "the cofactor of a_22 = 5 is?" :uhh: it all seems confusing. I learned about 3*3 matrices a few months ago, but I heard that they get a lot harder when n > 3 and m > 3.

- #4

TD

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To fully understand minors/cofactors, you'll need to know what determinants are, do you?

- #5

HallsofIvy

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TD said:

The applications are very different, solving lineair systems is a very common one.

That's an "array" or a "tableau". Any definition of matrices has to include the ability to add and multiply them.

- #6

TD

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Which is why I said "simply put"

- #7

radou

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- #8

An Anomaly

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eNathan said:What good do matrices do in the real world? I.E. what are they used for?

Too many things to list. From using them with kirchhoffs laws, to the cross product rule, to determining the amount of solutions within the system of equations.

- #9

AKG

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Have you looked?!eNathan said:I have not seen much talk about it on these forums.

- #10

Hurkyl

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The first example people learn is that of a

T(αx + βy) = αT(x) + βT(y)

where α and β are scalars. (If the scalars are, for example, real numbers, we say that this is an

Linear transformations are important because they respect the indicated algebraic operations.

- #11

HallsofIvy

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eNathan said:I have not seen much talk about it on these forums.

Check the "Linear and Abstract Algebra" forum!

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