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MaplePrimes Activity

These are questions asked by LichengZhang

        I  want save a set as shown below:
E := {{10, 11, 12, 13, 14}, {1, 2, 3, 4, 5, 6}, {4, 5, 6, 7, 8, 9, 10, 11}}
    The order of set is changed; I have known the list can do it following my order,
but I want to know what can I do in set?

I have a set like following:

               Set:={{1, 2}, {1, 3}, {1, 4}, {2, 3}};
I want to determine number of every member of set?
for example:  1 appears 3 times. 2 appears 2 times,
3 appears 2 times , 4 appears 1 time.

How to do?

 I use the following codes:
Graphs_data3:=[NonIsomorphicGraphs(6,restrictto =[connected], output
= graphs, outputform =graph)]:

Since  59 graphs are not many, so,I want to display  it. But the list show that
[Length of output exceeds limit of 1000000]`
How do I do?

If I use DrawGraph(Diameter2_select), the output is to large, and it is  not convenient to print it out .


 We know the following facts: 

The SequenceGraph command returns a graph with the specified degree sequence given as input, if such a graph exists. It raises an exception otherwise. 
 But  If I  want to get more graphs  that satisfy this condition of degree sequence ? (If graphs are not many ,I want get all graphs better)
what should I do.?
For example: DrawGraph(SequenceGraph([3, 2, 2, 1, 1, 1]));  It returns the first graph below, but it is obvious that the second graph also fits the condition.

  I want list all  diameter-2  Nonisomorphismgraphs  of order n . I use the following code, but its running speed  is slow with  order of graph gradually increasing . (for example,n=10)
 Are there other ways to Improve it? 
Graphs_data:=[NonIsomorphicGraphs(4,restrictto =[connected], output = graphs, outputform =graph)]:

  By the way,  Why doesn't size=[50,50] work ?

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