Ghosts from within

Ghosts of ghosts for second class constraints

When one uses the Dirac bracket, second class constraints become first class. Hence, they are amenable to the BRST treatment characteristic of ordinary first class constraints. This observation is the starting point of a recent investigation by Batalin and Tyutin, in which all the constraints are put on the same footing. However, because second class constraints identically vanish as operators ...

Lecture Notes on Ghosts & Differential Ghosts

Lecture 10 on Differential Equations & Differential Invariants and Lecture 11 on Differential Equations & Proofs equipped us with powerful tools for proving properties of differential equations without having to solve them. Differential invariants (dI) [Pla10a, Pla12] prove properties of differential equations by induction based on the right-hand side of the differential equation, rather than i...

Hypoxanthine production from nucleosides in erythrocyte ghosts.

A primary event in the metabolism of nucleosides by human erythrocytes involves the action of a nucleoside phosphorylase (l-3). In the presence of arsenate, free ribose is produced from adenosine, inosine, guanosine, and xanthosine (4). Adenosine has been reported to be converted to adenine (4), but other studies have shown that adenosine was converted by deamination to inosine and then cleaved...

Ghosts and Sparse Properties: Why Physicalists Have More to Fear from Ghosts than Zombies

Zombies are bodies without minds: creatures that are physically identical to actual human beings, but which have no conscious experience. Much of the consciousness literature concerns how threatening philosophical reflection on such creatures is to physicalism. There is not much attention given to the converse possibility, the possibility of minds without bodies, that is, creatures who are cons...

Ghosts of Company.