| #### D.15.3.35 derivationPrint Procedure from library `difform.lib` (see difform_lib). Usage: phi; phi derivation Side effects: prints the given derivation Remarks: Prints the string returned by derivationToString with a ls-ordering on the generators Example:
    LIB "difform.lib";
    ring R = 0,(a,b,c,x,y,z),lp;
    diffAlgebra();
    ==> // The differential algebra Omega_R was constructed and the differential \
       forms dDa, dDb, dDc, dDx, dDy, dDz, da, db, dc, dx, dy, dz are available.
    /////////////////
    // Derivations //
    /////////////////
    list L; L[1] = list(dx,dy,dz,da,db,dc); L[2] = list(1,12x-y,z4aby, 2*b5x,0,xyz-abc);
    derivation phi = L;
    derivation phi_poly = 3ab - c2*x + z;
    ///////////////////////////
    // Applications of Print //
    ///////////////////////////
    phi;
    ==>  Omega_R^1 --> R
    ==>        da |--> 2b5x
    ==>        db |--> 0
    ==>        dc |--> -abc+xyz
    ==>        dx |--> 1
    ==>        dy |--> 12x-y
    ==>        dz |--> abyz4
    ==>
    ==>
    phi_poly;
    ==>  Omega_R^1 --> R
    ==>        da |--> 3ab-c2x+z
    ==>        db |--> 3ab-c2x+z
    ==>        dc |--> 3ab-c2x+z
    ==>        dx |--> 3ab-c2x+z
    ==>        dy |--> 3ab-c2x+z
    ==>        dz |--> 3ab-c2x+z
    ==>
    ==>
    kill Omega_R,da,db,dc,dx,dy,dz,L,phi,phi_poly;
See also: derivationToString.

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