# De-conjecturing de Sitter

- Institution: CERN
- Department: TH institutes
- Speaker: Frederik Denef
- Year: 2019
- Language: English
- Subjects: Mathematics
- Source: [CERN](https://videos.cern.ch/record/3007275)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

I will begin by reviewing some of the challenges one encounters when trying to make sense of quantum gravity in the presence of a positive vacuum energy density. In particular string theory in its present form appears inadequate to settle even basic existence questions. To resolve these issues, a more fundamental, possibly holographic, quantitatively precise framework will likely be needed. I will discuss some recent progress in this direction..

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## Lectures

1. [De-conjecturing de Sitter](https://invisiblenetwork.ai/learn/cern/3007275/e0b13a551d10), 1 h 4 min (CERN's player)