Tagged Questions
8
votes
2answers
178 views
3
votes
0answers
76 views
An recurrence equation that can be solved in version 7 but not in version 8
A friend of mine showed me this code sample:
RSolve[{a[n] == a[n - 5] + 1, Sequence @@ Table[a[i] == 1, {i, 5}]}, a[n], n] // Timing
It's solved by version 7 in ...
2
votes
1answer
133 views
Version 7 and 8, different behavior of NSolve. Is it reproducible?
I noticed the following difference, and I wonder if it's a problem of my system or the results difference is actually due to the two different versions
...
11
votes
2answers
287 views
backward compatibility
When producing or enhancing code, it is tempting to use recent new primitives of Mathematica introduced in version 7 and 8, but for library code or in preparation or future version change in ...
4
votes
0answers
155 views
NullSpace[_, Method->“OneStepRowReduction”] is sometimes wrong; how can I work out when this happens?
(This is on MMA 7.0.1.0 on OS X)
I've just found a large matrix m for which NullSpace[m] and ...
