3.1 A list of functions

3.1.1 Getxvars

Getxvars()

:: Return x variables

return

[x_list, x_str] x_list is a list of x variables, x_str is a string consisting of x variables separated by commas.

In(4)=RingD("x,y");
In(5)=Getxvars():
[    [    y , x ]  , y,x, ] 

See also

Files

lib/restriction/complex.k

3.1.2 Firstn

Firstn(m,n)

:: Return the first n elements of m.

return

Matrix or vector

m

Matrix or vector

n

Number

• The first n elements of m. When m is a matrix, it returns the matrix consisting of first n elements of rows of m.

In(16)= mm = [[1,2,3],[4,5,6]];
In(17)= Firstn(mm,2):
    [[1,2], 
     [4,5]]

See also

Files

lib/restriction/complex.k

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