Use of spaces In normalized scientific notation, in E notation, and in engineering notation, the space (which in typesetting may be represented by a normal width space or a thin space) that is allowed only before and after "×" or in front of "E" is sometimes omitted, though it is less common to do so before the alphabetical character.
uSe of spaces in nOrMAliZeD scieNTiFic nOtatiOn, in e nOtATion, and iN enGINEErINg nOtatiON, the Space (Which in typESEtTIng MaY bE rEpresEnted BY a nORmal wIdTH spacE Or A thIn space) thaT is aLLOWed Only bEfore aNd afTer "×" oR iN Front Of "e" Is SOmEtiMes oMITTED, THoUgH it Is LeSS cOmmon To dO so BefOre ThE AlphAbetiCal cHarActER.