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This forum is provided to promote discussion amongst students enrolled in CITS5507 High Performance Computing.

Please consider offering answers and suggestions to help other students! And if you fix a problem by following a suggestion here, it would be great if other interested students could see a short "Great, fixed it!"  followup message.

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 UWA week 36 (2nd semester, mid-semester break) ↓
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2:05pm Mon 2nd Sep, Sebastian G.

##Multiplication of XC XB YC YB does not seem to work Hi - I might just be being a dumbass, but, it doesn't seem mathematically possible to convert the matrices XC XB YC YB into the value that is found by doing the multiplication of X and Y.

If anyone has managed to do this I would love an explanation on how the heck you managed to find the relationship between XC XB YC YB and the dot product of X and Y :)

The project asks us to "For example, if you are multiplying two matrices X and Y of size 100000×100000 each, you should generate two matrices XB, XC (for X) and Y B and Y C (for Y) and use these four matrices for multiplying X and Y" - but I don't see how that is actually possible - I have tried multiplying XB YB, or comparing to see which values are shared, including in the transpose of YB, but nothing matches the dot product of X and Y's (as in, XYB and XYC)

Thanks!


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10:04am Tue 3rd Sep, Yao T.

It can be done. XB,XC contain all the information of the matrix X, and the same for Y. So you can get whatever you need from those matrix. I would suggest you to reverse thinking, from what to be calculated to what can be used. It is something like putting the egges to the correct basket.So actually there are very simple solution for this.

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