lda

Dear R-helpers,
if I am right a discriminant analysis can be done with "lda".
My questions are:
1. What method to discriminate the groups is used by "lda" (Fisher's linar
discriminant function, diagonal linear discriminant analysis, likelihood ratio
discriminant rule, ...)?
2. How can I see, which method is used? (Typing just lda does not give me any
code).


Thank you in advance

Best wishes
K. Steinmann