It is incorrect. It is simply a typo.
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KywalkerMaybe someone made a mistake and it was copied everywhere?No, it is a common error to begin writing with a verb like "is" and then change your mind, to use "remain", but forget to delete "is".
KywalkerI was just wondering, how misleading this would be for non-native speakers.Since print magazines and newspapers have been largely displaced by on-line versions, copy editors (proofreaders) have lost their jobs. With the advent of citizen journalism, many professional journalists' jobs have been lost. The ones that are left are under pressure to publis