Inside École Polytechnique's largest research partnership: Sorbonne Université
Behind École Polytechnique's research output sits a defining relationship: 3,813 co-authored works with Sorbonne Université (France) in the five years to 2025, the university's single largest collaboration.
It anchors an unusually connected research base: 1,009 collaborating institutions across 76 countries, producing 13,427 joint works over the window, with international co-authors on 47% of output.
The collaborative work travels: its field-weighted citation impact stands at 2.14, where the world average is 1.0.
The Research Collaboration Index, the first global account of how universities actually collaborate, published its first full edition on 15 September 2026. The full results are public.
Every figure derives from the open global research record and is checkable at source.
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