The phrase "a substantially more complex" is correct and usable in written English.
It can be used when comparing the complexity of one thing to another, indicating that it is significantly more complicated.
Example: "The new software system is a substantially more complex solution than the previous version, requiring additional training for users."
Alternatives: "considerably more intricate" or "significantly more complicated".
But just two years later, Mr. Prince, Mr. Weill's heir, promoted her to a substantially more complex job, chief financial officer.
The Apache Software License version 2 is a substantially more complex document than the BSD license (4 pages versus 1) which explicitly declares each right granted or restricted.
The original version 1 of the Apache Software License was the same as the BSD license, which essentially says "Here, take it". The Apache Software License version 2 is a substantially more complex document than the BSD license (4 pages versus 1) which explicitly declares each right granted or restricted.
Go, a board game substantially more complex than chess, has long been considered a penultimate challenge for AI.
Our new reconvergence heuristic increases the throughput of our MMT model by 7%, when compared to a previous, and substantially more complex approach, due to Long et al. Moreover, it gives us an effective way to increase regularity in memory accesses.
Students are expected to integrate those advanced concepts into a game that is substantially more complex that the one developed in CS/INFO 3152.
However, such a determinant constraint is substantially more complex than the corresponding linear constraint in (P3).
I predict that Ethereum's transition to Proof-of-Stake will be slow and hesitant: it's essentially a whole new consensus algorithm, and one which substantially more complex (and therefore with a broader attack surface) than Proof-of-Work.
The results are from an aircraft component which is substantially more complex than the structures previously investigated by the authors.
The addition of multiple antennas at the primary transmitter and secondary receiver results in a model that is richer and substantially more complex.
