- #1
MadMax
- 99
- 0
Are the following identities correct? (They are under integration btw... and we are using the summation convention...)
1.) [tex]\delta_{ij}\delta_{ji}=1[/tex]
2.) [tex]\delta_{ij}a_j a_i = a^2[/tex]
3.) [tex]q_i q_j \delta_{ji} = q^2[/tex]
4.) [tex]q_i q_j a_j a_i = q^2 a^2[/tex]
My input:
kronecker delta's are equal to one if i=j and zero other wise... ?
a_i a_i = a^2... ?
q_i q_j = q^2 delta_ij... ?
Cheers
1.) [tex]\delta_{ij}\delta_{ji}=1[/tex]
2.) [tex]\delta_{ij}a_j a_i = a^2[/tex]
3.) [tex]q_i q_j \delta_{ji} = q^2[/tex]
4.) [tex]q_i q_j a_j a_i = q^2 a^2[/tex]
My input:
kronecker delta's are equal to one if i=j and zero other wise... ?
a_i a_i = a^2... ?
q_i q_j = q^2 delta_ij... ?
Cheers
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