less { hop { filter_eq { all_rows ; particle ; lambda } ; rest mass mev / c 2 } ; hop { filter_eq { all_rows ; particle ; omega } ; rest mass mev / c 2 } } = true
select the rows whose particle record fuzzily matches to lambda . take the rest mass mev  c 2 record of this row . select the rows whose particle record fuzzily matches to omega . take the rest mass mev  c 2 record of this row . the first record is less than the second record .