@conference {vanleeuwen2012EAGEcarpcg,
	title = {Preconditioning the Helmholtz equation via row-projections},
	booktitle = {EAGE Annual Conference Proceedings},
	year = {2012},
	month = {06},
	abstract = {3D frequency-domain full waveform inversion relies on being able to efficiently solve the 3D Helmholtz equation. Iterative methods require sophisticated preconditioners because the Helmholtz matrix is typically indefinite. We review a preconditioning technique that is based on row-projections. Notable advantages of this preconditioner over existing ones are that it has low algorithmic complexity, is easily parallelizable and extendable to time-harmonic vector equations.},
	keywords = {EAGE, Helmholtz equation, precondition},
	url = {http://slim.gatech.edu/Publications/Public/Conferences/EAGE/2012/vanleeuwen2012EAGEcarpcg/vanleeuwen2012EAGEcarpcg.pdf},
	presentation = {http://slim.gatech.edu/Publications/Public/Conferences/EAGE/2012/vanleeuwen2012EAGEcarpcg/vanleeuwen2012EAGEcarpcg_pres.pdf},
	url2 = {http://earthdoc.eage.org/publication/publicationdetails/?publication=58891},
	author = {Tristan van Leeuwen and Dan Gordon and Rachel Gordon and Felix J. Herrmann}
}
