The spacetime basis

b4 = {1, {γ1, γ2, γ3, γ4}, {σ1, σ2, σ3, iσ1, iσ2, iσ3}, {iγ1, iγ2, iγ3, iγ4}, i} ;

b4//MatrixForm

( {{1}, {{γ1, γ2, γ3, γ4}}, {{σ1, σ2, σ3, iσ1, iσ2, iσ3}}, {{iγ1, iγ2, iγ3, iγ4}}, {i}} )

n4 = 16 ;

a4 = {a0, {at, ax, ay, az}, {atx, aty, atz, axy, ayz, azx}, {ait, aix, aiy, aiz}, ai} ; b4 = {b0, {bt, bx, by, bz}, {btx, bty, btz, bxy, byx, bzx}, {bit, bix, biy, biz}, bi} ;

a4v = {0, {at, ax, ay, az}, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0}, 0} ;

b4v = {0, {bt, bx, by, bz}, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0}, 0} ;

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