acentric factor and configuration factor
factor VIII [=antihemophilia factor
factor X [=Stuart factor
factor XII [=Hageman factor
frequency factor preexponential factor
Nuclear factor (erythroid-2 related) factor 2
Nuclear factor erythroid 2-related factor 2
preexponential factor frequency factor
tumor necrosis factor receptor associated factor 6
Tumor necrosis factor receptor-associated factor 4
Tumour necrosis factor receptor-associated factor
Tumour necrosis factor receptor-associated factor 6
P-P factor pellagre-preventative factor
nuclear factor erythroid-2 related factor 2 Nrf2
nuclear factor erythroid 2-related factor 2 Nrf 2
nuclear factor E2-related factor 2
(2+1)-dimensional Hybrid lattice equation
(regular) residuated lattice