${\overline{\mu}}_{[E,H]}$

${\mathbb{R}}^{3}\times \mathbb{R}\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

${\mathbb{R}}^{3}\times \mathbb{R}\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

$\xi $
 [18] 
${\overline{\mu}}_{\mathrm{scalar}}$

${\mathbb{R}}^{3}\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{p}}\})$

${\mathbb{R}}^{3}\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{p}}\})$

$\xi $
 [18] 
${\overline{\mu}}_{\mathrm{spectral}}(\mathbf{r})$

${N}_{\epsilon}(\mathbf{r})\times \mathbb{R}\times \mathrm{span}(\{\widehat{\mathbf{p}}\})$

${N}_{\epsilon}(\mathbf{r})\times \mathbb{R}\times \mathrm{span}(\{\widehat{\mathbf{p}}\})$

$\xi $
 [11] 
$D({\mathbf{r}}_{1},{\mathbf{r}}_{2},t)$

${N}_{\epsilon}({\mathbf{r}}_{1})\times {N}_{\epsilon}(t)\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

${N}_{\epsilon}({\mathbf{r}}_{2})\times {N}_{\epsilon}(t)\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

$(4{\xi}^{2}1)/3$
 [14] 
$\mu ({\mathbf{r}}_{1},{\mathbf{r}}_{2},\omega )$

${N}_{\epsilon}({\mathbf{r}}_{1})\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{p}}\})$

${N}_{\epsilon}({\mathbf{r}}_{2})\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{p}}\})$

$\xi $
 [20] 
${\mu}_{\mathrm{STF}}({\mathbf{r}}_{1},{\mathbf{r}}_{2},\omega )$

${N}_{\epsilon}({\mathbf{r}}_{1})\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

${N}_{\epsilon}({\mathbf{r}}_{2})\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

$\xi $
 [12] 
$\gamma ({\mathbf{r}}_{1},{\mathbf{r}}_{2},t)$

${N}_{\epsilon}({\mathbf{r}}_{1})\times {N}_{\epsilon}(t)\times \mathrm{span}(\{\widehat{\mathbf{p}}\})$

${N}_{\epsilon}({\mathbf{r}}_{2})\times {N}_{\epsilon}(t)\times \mathrm{span}(\{\widehat{\mathbf{p}}\})$

$\xi $
 [20] 
${\gamma}_{\mathrm{STF}}({\mathbf{r}}_{1},{\mathbf{r}}_{2},t)$

${N}_{\epsilon}({\mathbf{r}}_{1})\times {N}_{\epsilon}(t)\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

${N}_{\epsilon}({\mathbf{r}}_{2})\times {N}_{\epsilon}(t)\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

$\xi $
 [22] 
${P}_{2}(\mathbf{r},\omega )$

${N}_{\epsilon}(\mathbf{r})\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{p}},\widehat{\mathbf{q}}\})$

${N}_{\epsilon}(\mathbf{r})\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{p}},\widehat{\mathbf{q}}\})$

$\sqrt{2{\xi}^{2}1}$
 [34] 
${P}_{3}(\mathbf{r},\omega )$

${N}_{\epsilon}(\mathbf{r})\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

${N}_{\epsilon}(\mathbf{r})\times {N}_{\epsilon}(\omega )\times \mathrm{span}(\{\widehat{\mathbf{x}},\widehat{\mathbf{y}},\widehat{\mathbf{z}}\})$

$\sqrt{(3{\xi}^{2}1)/2}$
 [34] 