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I tried solving following partial difference equation in Mathematica by typing

RSolve[{C[n, k] == C[n-1, k] + C[n-1, k-1], C[n, 0] == 1, C[n, n] == 1}, C[n, k], {n, k}]

but returns the following error message

RSolve::conarg: The arguments should be ordered consistently. >>

but it does not work, please someone help me in this regard. Thanks and regards in advance.

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And when it failed it did not got you thinking ... ? –  Sektor Mar 17 at 17:55
    
@Sektor Do you imply that there is a trivial error? I fail to see it, could you please be more specific? –  István Zachar Mar 17 at 19:10
    
@IstvánZachar No, imply that he ran into some kind of trouble and the first thing to do is: Help me ! –  Sektor Mar 17 at 19:17
    
@IstvánZachar C[n, n] == 1 isn't an init.cond nor a rec.rel. –  belisarius Mar 17 at 20:23
1  
@IstvánZachar To me, most Mma errors (including this one) sound more like an invitation to exegesis. –  belisarius Mar 17 at 21:16

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