What is dark matter?
Dark matter names a gravitational discrepancy: stars, galaxies and light behave as though there is more gravitating matter than the luminous material accounts for. OPH explores a candidate in which extra gravitational response comes from records and repair structure on the collars, the boundaries of observer regions. A persistent collar contribution could look like unseen mass in an effective spacetime description. The papers construct conditional contributions and galactic profiles; identifying them with the observed dark sector requires further physical premises. Matching a galaxy's rotation curve is one test. The same mechanism must also account for gravitational lensing, clusters and cosmological structure using compatible assumptions. This is OPH's proposed explanation, rather than a theorem that all observed missing gravity has been reproduced by one native source.
See also What is dark energy?, Why does gravity look like curved spacetime?
Sources: OPH dark-matter candidate and its physical premises
Also in Chapter 24: Why Does a Region's Memory Scale With Its Surface?.
This answer comes from OPH, Observer Patch Holography. OPH is a rigorous, consistent and complete description of the unified, self-creating computational Universe we inhabit. Its consistency is machine-checked: the fixed point at its core is constructed explicitly, and a theory with a model contains no contradiction.
To understand OPH and check every step yourself, start with the free book Reverse Engineering Reality. It builds the theory from the ground up, and the OPH Notebook answers your questions while you read.
read the free bookask the notebookor ask sage:read chapter 33: Why Was Every Open Problem the Same Problem?watch a universe make its own particles