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What is the difference between Deformation technique and Ekeland's variational principle to approach Mountain Pass theorem ?

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Did you read both proofs? – Tomás Aug 8 '13 at 11:15
@tomas yes for deformation i follow Evans book pls give suggetion for read(book ) Ekeland variational principle. Now am reading "topic in sobolev spaces and applications" by D.bahuguna, v.raghavendra, b.v.rathish kumar.pls if you say the difference it will very helpful for me.Because it is little hard – nanthini Aug 9 '13 at 6:29

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