Volume 9, Issue 3 Ali Taghavi Roja Hosseinzadeh Hamid Rohi Maps preserving the fixed points of sum of operators Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Ali Taghavi Roja Hosseinzadeh Hamid Rohi Find more articles with the same keywords preserver problem operator algebra fixed point Find more articles with the same subject classes 46J10 47B48