> restart: grtw();

Coordinate calculation

> qload(visser);

> grcalc(G(up,dn));

Created definition for G(up,dn) 

> gralter(_,13,2,7);

Component simplification of a GRTensorII object:

Applying routine `Apply constraints repeatedly` to object G(up,dn)

Applying routine `simplify[trig]` to object G(up,dn)

Applying routine factor to object G(up,dn)

> grdisplay(_);

Basis calculation

> qload(visserb);

> grcalc(G(bdn,bdn));

Created definition for rot(bdn,bup,bdn) 

Created a definition for e(bdn,dn,pdn)

> gralter(_,13,2,7);

Component simplification of a GRTensorII object:

Applying routine `Apply constraints repeatedly` to object G(bdn,bdn)

Applying routine `simplify[trig]` to object G(bdn,bdn)

Applying routine factor to object G(bdn,bdn)

> grdisplay(_);

>