## Geometry & Topology

### Lagrangian matching invariants for fibred four-manifolds: II

Tim Perutz

#### Abstract

In the second of a pair of papers, we complete our geometric construction of “Lagrangian matching invariants” for smooth four-manifolds equipped with broken fibrations. We prove an index formula, a vanishing theorem for connected sums and an analogue of the Meng–Taubes formula. These results lend support to the conjecture that the invariants coincide with Seiberg–Witten invariants of the underlying four-manifold, and are in particular independent of the broken fibration.

#### Article information

Source
Geom. Topol., Volume 12, Number 3 (2008), 1461-1542.

Dates
Received: 7 June 2006
Revised: 14 November 2007
Accepted: 11 December 2007
First available in Project Euclid: 20 December 2017

Permanent link to this document
https://projecteuclid.org/euclid.gt/1513800102

Digital Object Identifier
doi:10.2140/gt.2008.12.1461

Mathematical Reviews number (MathSciNet)
MR2421133

Zentralblatt MATH identifier
1144.53104

#### Citation

Perutz, Tim. Lagrangian matching invariants for fibred four-manifolds: II. Geom. Topol. 12 (2008), no. 3, 1461--1542. doi:10.2140/gt.2008.12.1461. https://projecteuclid.org/euclid.gt/1513800102

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