Description: A monoid is a magma. (Contributed by FL, 2-Nov-2009) (Revised by AV, 6-Jan-2020) (Proof shortened by AV, 6-Feb-2020)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | mndmgm | |- ( M e. Mnd -> M e. Mgm ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mndsgrp | |- ( M e. Mnd -> M e. Smgrp ) |
|
| 2 | sgrpmgm | |- ( M e. Smgrp -> M e. Mgm ) |
|
| 3 | 1 2 | syl | |- ( M e. Mnd -> M e. Mgm ) |