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Questions tagged [sequence]

Questions on specifying order in and splicing of lists, including use of Mathematica Sequence objects.

12 questions with no upvoted or accepted answers
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33
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837 views

Performance problems in new Sequence functions

The new-in-10.1 Sequence* family of functions should provide newly optimized methods for handling sequence problems. Happily in some cases they do! For example ...
5
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0answers
81 views

SimilarityRules for SequenceAlignment of two lists

I am trying to use the SimilarityRules option of SequenceAlignment to customize its output. This works perfectly for strings, ...
4
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0answers
85 views

Pattern match Shortest BlankNullSequence in SequencePosition

Apologies if this has an answer somewhere but I can't find it. From the examples for SequencePosition we are shown that ...
2
votes
0answers
101 views

Find the second longest common subsequence?

I am trying to determine that how my sequence(probe) "hits" against a long sequence(genome). The LongestCommonSubsequence in Mathematica gives the first longest common subsequence between two ...
2
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0answers
147 views

Find algorithm or generator formula with automated procedure and pattern recognition

I am trying to find a generator formula for the discriminant of a polynomial and believe it would be an interesting problem for the Mathematica community to know how to automate evaluation of certain ...
2
votes
0answers
91 views

Limit[Sum[(2*E*n)^w/(w^(n/2+w)), {w,2,n}],n->Infinity]

I would like to show that the following (and other similar formulae) tends to zero. Limit[Sum[(2*E*n)^w/(w^(n/2+w)), {w,2,n}],n->Infinity] What's the right ...
1
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0answers
28 views

Is there a way to predict permutations that consist of sets?

SequencePredict is a function that predicts the next value from the arranged data. But I want to use the data for the combination to predict the next combination(...
1
vote
0answers
70 views

Possible bug with `FindSequenceFunction`$.$

Consider the following code: g = Table[Sign[StieltjesGamma[n]], {n, 0, 30}]; s = FindSequenceFunction[g]; The result is a certain ...
1
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0answers
59 views

Speed up for SequencePredictorFunction?

From Google Dive: SequencePredictorFunction is here, along with my test data. From pastbin: prediction function and data is here. Using the ...
0
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0answers
33 views

How to convert a symbolic recursive formula to a non-recursive one

I am new to Mathematica. I want to convert a recursive formula to a non-recursive one using symbolic math. Specifically, I have a recursive formula similar to this: $a_n = f_a(c_{n-1}, x_{n-1})$ $...
0
votes
0answers
73 views

Is there an integral number `k` satisfying the equation `a[n] = k^2`?

I have a sequence a[n] with $$a(n+1)=4 a(n)-2 a(n-1),\quad a(0) = 1,\ a(1) = 28.$$ I use ...
0
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0answers
82 views

Is there a **simple** way to define a function on a variable sequence?

I have a List j={j[1],j[3],j[6]}. But this list is in fact a variable of my code, so i could have j={j[6],j[10]} either. I need ...