The phrase "discussing the subject of" is correct and usable in written English.
It can be used when introducing a topic or theme that is being talked about or analyzed.
Example: "In this paper, we will be discussing the subject of climate change and its impact on global ecosystems."
Alternatives: "talking about" or "addressing the topic of".
Discussing the subject of youth unemployment, Mr Miliband said young people in work should mentor those out of work.
Another juror, a former magazine editor, said her glimpse of the transcript indicated it was between Onta Williams and his father, "discussing the subject of entrapment".
They do their best to avoid discussing the subject of the petition, instead ushering people to the table, where another team member pressures them into signing in conveyor-belt fashion.Another tactic is the "clipboard method".
In first discussing the subject of the book last spring, Mr. Brown mentioned that the architecture of Washington is rich in symbolism, something that he is using in the novel.
Without discussing the subject of the conversation, a woman claims not to be lying and deflects her caller's ever more insistent demands for evidence — even as the image, connected to the voice, threatens to be itself a sort of deception of exactly the sort on which the story runs.
As people invariably do when discussing the subject of appointing guardians for their children, Alina Tugend overlooked the single most important criterion that parents should consider: Who would best be able emotionally to help our children cope with the trauma of losing their parents.
Stewart had to share one clip he found of Sarah Palin discussing the subject on Fox News where she invents an interesting moniker by accident: "squirmish".
I avoid discussing the subject for fear of derision from my colleagues and the complete loss of my peers' respect.
Mr. DiLeonardo would not discuss the subject of that investigation.
He will discuss the subject of continued support from the NATO-led Inthenational Security and Assistance force and the American-led force.
Two traders, Matt and Tom, discussed the subject of caps on Aug. 3, 2000: Tom: You getting rich?
