update

README.md

@@ -152,9 +152,9 @@ Synchronization constraints:
 
 | Constraint | Threshold |
 | --- | --- |
-| `|t_left - t_right|` | `<= 5 ms` |
-| `|t_left - t_imu|` | `<= 5 ms` |
-| `|t_left - t_odom|` (VIO only) | `<= 5 ms` |
+| $\\lvert t_{left} - t_{right} \\rvert$ | $\\le 5\\ \\mathrm{ms}$ |
+| $\\lvert t_{left} - t_{imu} \\rvert$ | $\\le 5\\ \\mathrm{ms}$ |
+| $\\lvert t_{left} - t_{odom} \\rvert$ (VIO only) | $\\le 5\\ \\mathrm{ms}$ |
 
 ### Missing Data Handling
 
@@ -206,4 +206,4 @@ if not np.isinf(np.asarray(pos)).any():
 ```
 
 ## License
-This software and dataset are released under the [MIT License](LICENSE).
+This software and dataset are released under the [MIT License](LICENSE).