Twisting type N vacuums with cosmological constant

Abstract

We provide the first examples of vacuum metrics with cosmological constant which have a twisting quadruple principal null direction.

References in corpus (1)

• On Penrose's `before the big bang' ideas

Cited by in corpus (4)

• Type III and N Einstein spacetimes in higher dimensions: general properties
• Lower-order ODEs to determine new twisting type N Einstein spaces via CR geometry
• On twisting type $[\text{N}]\otimes [\text{N}]$ Ricci flat complex spacetimes with two homothetic symmetries
• CR Structures and Twisting Vacuum Spacetimes with Two Killing Vectors and Cosmological Constant: Type II and More Special