The phrase 'breakthrough of which' is correct and usable in written English.
You can use it when referring to a breakthrough that has already been mentioned earlier in a sentence or paragraph. For example: The scientists were able to make a major breakthrough in the field of medicine, of which the implications are far-reaching.
In the language and spirit of their vague joint announcement, however, Israeli and Palestinian officials suggested that they were on the verge of a breakthrough on which only this Israeli government could make good.
Iran regularly announces technological breakthroughs, most of which are impossible to verify independently.
Readers who tire of this kind of whimsy can always contemplate the next in a series of wondrous scientific breakthroughs, all of which have unexpected consequences -- as when the technology of faxing people makes possible multiple murders of the same victim.
This has lead to a veritable orgy of press releases announcing countless major scientific breakthroughs, most of which in the harsh light of reality tend to be highly overrated.
INNOVATION LEAST LIKELY TO IMPROVE THE SPECIES In August the Cartoon Network announced the kind of breakthrough for which the word "dubious" was invented: an app that allows children to watch the channel's shows on half of an iPad screen while playing video games based on those shows on the other half.
(For instance, Whitehead's cosmology (a solid philosophical reference but not an easy read) talks a lot about societies and populations, nexus of all kinds of elements, which could have emergent properties, and could offer interesting breakthroughs, the probabilities of which are probably impossible to derive mathematically).
A committee of gatekeepers, combined with random selection of candidate panels and diversity among the questioners, won't produce Lincoln-Douglas, but it will improve on the breakthroughs of 2016 — which crushed the chaos of the GOP primary debates in 2012.
Since 1922, Harvard Business Review has been a leading source of breakthrough management ideas-many of which still speak to and influence us today.
Since 1922, "Harvard Business Review" has been a leading source of breakthrough management ideas-many of which still speak to and influence us today.
