Order Theory
The answer to Suslin's problem is independent of ZFC. The diamond principle ◊ proves the existence of a Suslin line, while MA + ¬CH proves that no Suslin line exists.
Existence of Kurepa trees is independent of ZFC.
Read more about this topic: List Of Statements Undecidable In ZFC
Famous quotes containing the words order and/or theory:
“In a drama of the highest order there is little food for censure or hatred; it teaches rather self-knowledge and self- respect.”
—Percy Bysshe Shelley (17921822)
“Freud was a hero. He descended to the Underworld and met there stark terrors. He carried with him his theory as a Medusas head which turned these terrors to stone.”
—R.D. (Ronald David)
Related Phrases
Related Words