# yuma3_enabled (/docs/hyperparameters/yuma3-enabled)

`yuma3_enabled` switches a subnet's epoch from the classic Yuma bond computation to the Yuma3 variant. Subnet owners toggle it to change how validator dividends reward conviction; validators care because it alters both the bond math and whether liquid alpha can apply at all.

## How it works [#how-it-works]

The epoch function branches on `Yuma3On` (`pallets/subtensor/src/epoch/run_epoch.rs`, "Bonds and Dividends" section):

* **Classic path (off).** Instant bonds `ΔB = W ∘ S` are column-normalized, smoothed by the flat EMA from [`bonds_moving_avg`](/docs/hyperparameters/bonds-moving-avg) (`compute_ema_bonds_normal`), and dividends are `d_i = Σ_j B_ij × I_j`.
* **Yuma3 path (on).** Bonds are read as fixed proportions (`get_bonds_fixed_proportion`) without column normalization, the EMA runs through `compute_bonds` — which is where [`liquid_alpha_enabled`](/docs/hyperparameters/liquid-alpha-enabled) can swap in per-pair alpha rates — and dividends are the row-sum of normalized EMA bonds times incentive, scaled by each validator's active stake, then renormalized.

Practical consequence: liquid alpha and its parameters ([`alpha_low`](/docs/hyperparameters/alpha-low), [`alpha_high`](/docs/hyperparameters/alpha-high), [`alpha_sigmoid_steepness`](/docs/hyperparameters/alpha-sigmoid-steepness)) only take effect when this flag is on; the classic path never consults them. See the [Yuma Consensus overview](/docs/concepts/emissions#yuma-consensus) for the full epoch pipeline.

The two paths split the same dividend pool differently whenever validators disagree — compare them on a minimal example:

<HyperparamYuma3Chart />

## Reading and setting [#reading-and-setting]

```
btcli sudo get --netuid N --name yuma3_enabled
```

Boolean — pass true or false:

```
btcli sudo set --netuid N --name yuma3_enabled --value true
```

## Related [#related]

[`liquid_alpha_enabled`](/docs/hyperparameters/liquid-alpha-enabled), [`bonds_moving_avg`](/docs/hyperparameters/bonds-moving-avg), [`bonds_penalty`](/docs/hyperparameters/bonds-penalty), [`bonds_reset_enabled`](/docs/hyperparameters/bonds-reset-enabled)