The free $A$-ring is a graded $A$-ring.

Warren, Roger D.. "The free -ring is a graded -ring.." International Journal of Mathematics and Mathematical Sciences 16.3 (1993): 617-619. <http://eudml.org/doc/46949>.

@article{Warren1993,
author = {Warren, Roger D.},
journal = {International Journal of Mathematics and Mathematical Sciences},
keywords = {graded ring; tensor -ring; free -ring; universal property; graded ring; tensor -ring; free -ring},
language = {eng},
number = {3},
pages = {617-619},
publisher = {Hindawi Publishing Corporation, New York},
title = {The free -ring is a graded -ring.},
url = {http://eudml.org/doc/46949},
volume = {16},
year = {1993},
}

TY - JOUR
AU - Warren, Roger D.
TI - The free -ring is a graded -ring.
JO - International Journal of Mathematics and Mathematical Sciences
PY - 1993
PB - Hindawi Publishing Corporation, New York
VL - 16
IS - 3
SP - 617
EP - 619
LA - eng
KW - graded ring; tensor -ring; free -ring; universal property; graded ring; tensor -ring; free -ring
UR - http://eudml.org/doc/46949
ER -