Introduction:
      
            The group has two primary research interests. The first is concentrated around the study and classification of differentiable manifold and their invariants, mainly in low-dimensional cases. This includes knot theory, contact 3-manifolds, Heegaard Floer theory, Khovanov theory, Seiberg-Witten theory, low-dimensional surgery techniques, and their applications. The second research area is the theory of complex algebraic/analytic varieties, with a  special emphasize on the local theory  of singularities, including the study of their analytic and topological invariants.
The bridge between the two research areas is realized by the links of singularities, creating common research objectives (e.g., topological and analytical lattice homology, topological invariants of links of singularities, and their effects on analytic invariants).
The department runs a weekly seminar.
 
Head of Department:
 
	
			
				Némethi András
				
            Research Professor
      
			
		
		
	Research Professor
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:I.1.
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			Phone:+3614838320
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			Email:nemethi.andras (at) renyi.hu
Employees:
 
	
			
				Beke Márton
				
            Assistant Research Fellow
      
			
		
		
	Assistant Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:II.5.
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			Phone:+36 1 483 8326
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			Email:beke.marton (at) renyi.hu
 
	
			
				Csépai András
				
            Assistant Research Fellow
      
			
		
		
	Assistant Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:I.2.
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			Phone:+36 1 483 8325
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			Email:csepai.andras (at) renyi.hu
 
	
			
				de la Bodega Domingo-Aldama Javier
				
            Research Fellow
      
			
		
		
	Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:1.2.
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			Phone:+36 1 483 8325
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			Email:de.la.bodega.javier (at) renyi.hu
 
	
			
				Földvári Viktória Andrea
				
            Research Fellow
      
			
		
		
	Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:I/2.
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			Phone:1/4838325
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			Email:foldvari.viktoria (at) renyi.hu
 
	
			
				Alexander Hof
				
            Research Fellow
      
			
		
		
	Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:I.1
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			Phone:+3614838320
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			Email:hof.alexander (at) renyi.hu
 
	
			
				Juhász András
				
            Research Fellow
      
			
		
		
	Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:I/2.
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			Phone:1/4838325
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			Email:juhasz.andris (at) renyi.hu
 
	
			
				Koltai László András
				
            Assistant Research Fellow
      
			
		
		
	Assistant Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:II.2.
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			Phone:+36 1 483 8307
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			Email:koltai.laszlo (at) renyi.hu
 
	
			
				Kubasch Alexander Arnd
				
            Assistant Research Fellow
      
			
		
		
	Assistant Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:Reál 11.
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			Phone:+36 1 483 8397
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			Email:kubasch.alexander (at) renyi.hu
 
	
			
				Marco Marengon
				
            Senior Research Fellow
      
			
		
		
	Senior Research Fellow
      
			- 
			Research group:Low-dimensional topology
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			Research department:Algebraic geometry and differential topology
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			Room:I.1.
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			Phone:+3614838320
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			Email:marengon.marco (at) renyi.hu
 
	
			
				Matszangosz Ákos
				
            Research Fellow
      
			
		
		
	Research Fellow
      
			- 
			Research group:-
- 
			Research department:Algebraic geometry and differential topology
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			Room:II.2.
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			Phone:+3614838307
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			Email:matszangosz.kyriakos.akos (at) renyi.hu
 
	
			
				McDonald Clayton
				
            Research Fellow
      
			
		
		
	Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:I.2.
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			Phone:+36 1 483 8325
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			Email:mcdonald.clayton (at) renyi.hu
 
	
			
				Nagy Anita Enikő
				
            Assistant Research Fellow
      
			
		
		
	Assistant Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:II.5.
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			Phone:+36 1 483 8326
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			Email:nagy.anita.eniko (at) renyi.hu
 
	
			
				Nagy János
				
            Research Fellow
      
			
		
		
	Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:I.2.
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			Phone:+36 1 483 8325
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			Email:nagy.janos (at) renyi.hu
 
	
			
				Schefler Gergő
				
            Assistant Research Fellow
      
			
		
		
	Assistant Research Fellow
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:II.2.
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			Phone:+36 1 483 8307
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			Email:schefler.gergo (at) renyi.hu
 
	
			
				András Stipsicz
				
            Director of the Institute, Research Professor
      
			
		
		
	Director of the Institute, Research Professor
      
			- 
			Research group:Low-dimensional topology
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			Research department:Algebraic geometry and differential topology
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			Room:fsz.3.
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			Phone:06 1 483 8355
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			Email:stipsicz.andras (at) renyi.hu
 
	
			
				Szabó Endre
				
            Research Professor
      
			
		
		
	Research Professor
      
			- 
			Research group:-
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			Research department:Algebraic geometry and differential topology
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			Room:I.4.
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			Phone:06 1 483 8336
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			Email:szabo.endre (at) renyi.hu
 
	
			
				Szabó Szilárd
				
            Senior Research Fellow
      
			
		
		
	Senior Research Fellow
      
			- 
			Research group:Low-dimensional topology
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			Research department:Algebraic geometry and differential topology
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			Room:III.15
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			Phone:+3614838333
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			Email:szabo.szilard (at) renyi.hu
 
	
			
				Szőke Róbert
				
            Research Professor
      
			
		
		
	Research Professor
      
			- 
			Research group:
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			Research department:Algebraic geometry and differential topology
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			Room:III.10.
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			Phone:+36 1 483 8306
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			Email:szoke.robert (at) renyi.hu
 
	
			
				Tagliente Simone
				
            Assistant Research Fellow
      
			
		
		
	Assistant Research Fellow
      
			- 
			Research group:
- 
			Research department:Algebraic geometry and differential topology
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			Room:I.2.
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			Phone:+36 1 483 8325
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			Email:tagliente.simone (at) renyi.hu
 
	
			
				Sarah Juliet Zampa
				
            Assistant Research Fellow
      
			
		
		
	Assistant Research Fellow
      
			- 
			Research group:-
- 
			Research department:Algebraic geometry and differential topology
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			Room:II.5.
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			Phone:+3614838326
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			Email:zampa.sarah (at) renyi.hu
Events:
András Némethi (Rényi Institute): Lattice cohomology II
  - 
             Rényi, Nagyterem + Zoom
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             -
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        András Némethi (Rényi Institute): Lattice cohomology I
  - 
             Rényi, Nagyterem + Zoom
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             -
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        András Csépai (ELTE): Analogues of the Atiyah-Wall exact sequences for cobordism groups of singular maps
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             Rényi, Nagyterem + Zoom
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             -
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        Ben Davison (University of Edinburgh): Fermionizing Yangians via central extensions of preprojective algebras
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             Online, Zoom webinar
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        Thomas Hudson (University of Wuppertal): Towards an equivariant Bézout's theorem
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             Rényi, Nagyterem + Zoom
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        András Stipsicz (Rényi Institute): On exotic 4-manifolds
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             Rényi, Nagyterem + Zoom
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        Marina Logares (Universidad Complutense Madrid): The many facets of Higgs bundles
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             Online, Zoom webinar
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             -
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        Richárd Rimányi (University of North Carolina at Chapel Hill): Enumerative geometry on Cherkis bow varieties
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             Online, Zoom webinar
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             -
           -
        Sergey Cherkis (The University of Arizona): The Geometry of Instantons on multi-Taub-NUT Space
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             Online, Zoom webinar
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             -
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        Marco Marengon (Rényi Institute): Relative genus bounds in indefinite 4-manifolds
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             Rényi, Nagyterem + Zoom
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           -