What is minor expression number?

The expression number derived from your short name is the minor expression number. The influence of minor expression number is minor comparative to your expression number.
Normally short name is the name you feel closest to you in your family and society.
Short name is the name sometime you call yourself when you are alone.
Do not use your pre or post name for your short name.
Deriving minor expression follows same rule like your expression number.
Mary John Peterson normally introduces herself as Mary only.
So Mary = 4+1+9+7 = 21 = 2+1 = 3.

So Mary’s minor number is 3

The minor expression number’s symbol is smaller triage.