delta t and links

examples/problems/800_score_genes_for_marginals.ipynb

@@ -211,6 +211,8 @@
     "\n",
     "We could use the parameters corresponding to the birth-death process on gene expression space with birth rate $\\beta$ and death rate $\\delta$: during a time interval $\\Delta t$, the probability of a birth is $\\beta \\Delta t$ and the probability of a death is $\\delta \\Delta t$.\n",
     "\n",
+    "The $\\Delta t$ is inferred automatically from `~moscot.problems.time.TemporalProblem.temporal_key` in this case and works with any problem with `temporal_key` present - e.g. `~moscot.problems.time.LineageProblem.temporal_key` and `~moscot.problems.spatiotemporal.SpatioTemporalProblem.temporal_key`.\n",
+    "\n",
     "Then the birth process is\n",
     "\n",
     "$\\beta_{max}$ - maximum birth rate in optimal conditions, $\\beta_{min}$ - minimum birth rate (e.g. in absence of proliferative signals), $\\beta_{center}$ - peak value of probabilistic birth rate distribution, $\\beta_{width}$ - variability of the birth rate.\n",