You can find a lot of accommodations in Paris, but be mindful of the commute duration (at least 1h by train). There are also several hotels available near École Polytechnique. The following list is not exhaustive :
1. Flat AdagioCity in Palaiseau
The closest hotel, at walking distance from the conference location.
Starting at 140€ per night.
2. Novotel in Saclay
In the center of Saclay, starting from 150€ per night. You can take the bus from Salcay to École polytechnique.
3. All Suites Apparthotel in Palaiseau
At 10 minutes by bus from École polytechnique, starting at 90€ per night.
4. Golden Tulip inn in Massy
Hotel close from the Train Station Massy-Palaiseau, at 20min from École polytechnique by bus, and 40min from Paris.
Starting à 100€ per night
5. Villabona Guest house nearPalaiseau
Bed and Breakfast at 30min walk from École polytechnique, starting at 99€ per night.
6. Moulin de Lily, in Palaiseau
Lovely accommodation a bit further from the transports and École polytechnique.
Starting from 75€ per night.
You can use websites like Booking, accor, or similar to find other acco