N.B. When the Examiner wishes for other proofs than the above, the necessary restrictions and allowable assumptions may be given in the question.

PRELIMINARY NOTICES.

The following symbols will be used simply in lieu of the words to which they are here prefixed.

The object aimed at is merely to place before the student the various steps of an argument in a more succinct form by curtailing the verbiage, thus enabling him to take in at a glance the outline of a proof. It must however be borne in mind that the words themselves must be substituted in any examinations in which symbols are objected to.