declare R1 {
    mode=(2,0),
    latex="R",
    scalar=true
}

declare T1 {
    mode=(2,0),
    latex="t",
    scalar=true,
    reduce=true
}

declare H22 {
    mode=(2,2),
    latex="{^{22} \Omega}",
    scheme=((1,2),(3,4)),
}

R1_pq = 1/2 * sum_ab(H22_pqab * T1_ab);
