Subversion Repositories wimsdev

!if $wims_read_parm!=slib_header

  !goto proc

!endif

slib_author=Gang, XIAO

slib_example=3, 5

slib_require=pari

!exit

:proc

!distribute items $wims_read_parm into slib_size,slib_range,slib_ring

!default slib_ring=Z

!bound slib_size between integer 2 and 20 default 2

!bound slib_range between integer 1 and 1000000 default 2

!if $slib_ring=Z

  slib_sh1=!shuffle $slib_size

  slib_sh2=!shuffle $slib_size

  slib_ran1=(random($slib_range)*(2*random(2)-1))

  slib_ran2=(2*random(2)-1)

  slib_coefu=if(x==y,$slib_ran2,if(x>y,0,$slib_ran1))

  slib_coefd=if(x==y,$slib_ran2,if(x<y,0,$slib_ran1))

  slib_triu=matrix($slib_size,$slib_size,x,y,$slib_coefu)

  slib_trid=vecextract(matrix($slib_size,$slib_size,x,y,$slib_coefd),[$slib_sh1],[$slib_sh2])

  slib_out=!exec pari print($slib_triu*$slib_trid)

  !exit

!endif