# physics/vectorbold-to-vb

Collapse vectorbold to the short vb helper.

https://texform.dev/rules/physics/vectorbold-to-vb

## Metadata

| Field | Value |
| --- | --- |
| Key | physics/vectorbold-to-vb |
| Level | authoring |
| Fidelity | render |
| Enabled by packages | physics |
| Profiles | Authoring, Faithful, Corpus, Equiv |

## Rewrite patterns

### vectorbold

From:

```latex
\vectorbold{#1}
```

To:

```latex
\vb{#1}
```

### vectorbold-star

From:

```latex
\vectorbold*{#1}
```

To:

```latex
\vb*{#1}
```

## Examples

Examples show the rule in isolation, not a complete normalization profile.

### vectorbold newton law

Before:

```latex
\vectorbold{F}=m\vb{a}
```

After this rule:

```latex
\vb{F}=m\vb{a}
```

Packages: base, physics.

Rendering verified with the declared packages.

### vectorbold star bold italic

Before:

```latex
\vectorbold*{\alpha}+\vectorbold*{p}
```

After this rule:

```latex
\vb*{\alpha}+\vb*{p}
```

Packages: base, physics.

Rendering verified with the declared packages.

## Triggers

- [\\vectorbold](https://texform.dev/latex/commands/vectorbold)

## Eliminates

- [\\vectorbold](https://texform.dev/latex/commands/vectorbold)

## Produces

- [\\vb](https://texform.dev/latex/commands/vb)

## Downstream

- [physics/vb-to-mathbf](https://texform.dev/rules/physics/vb-to-mathbf): Canonicalize vb to an explicit mathbf wrapper.

## Same family

- [physics/derivative-to-dv](https://texform.dev/rules/physics/derivative-to-dv): Collapse derivative to the compact dv command.
- [physics/functional-derivative-to-fdv](https://texform.dev/rules/physics/functional-derivative-to-fdv): Collapse long functional derivative names to the fdv command.
- [physics/partial-derivative-to-pdv](https://texform.dev/rules/physics/partial-derivative-to-pdv): Collapse long partial derivative names to the pdv command.
- [physics/vectorarrow-to-va](https://texform.dev/rules/physics/vectorarrow-to-va): Collapse vectorarrow to the short va helper.
- [physics/vectorunit-to-vu](https://texform.dev/rules/physics/vectorunit-to-vu): Collapse vectorunit to the short vu helper.
- [physics/dv-to-frac-d](https://texform.dev/rules/physics/dv-to-frac-d): Expand dv forms to explicit d-based derivative fractions.
- [physics/fdv-to-frac-delta](https://texform.dev/rules/physics/fdv-to-frac-delta): Expand fdv forms to explicit delta-based derivative fractions.
- [physics/pdv-to-frac-partial](https://texform.dev/rules/physics/pdv-to-frac-partial): Expand pdv forms to explicit partial-derivative fractions.
- [physics/va-to-vec-mathbf](https://texform.dev/rules/physics/va-to-vec-mathbf): Canonicalize va to an explicit vec-wrapped mathbf form.
- [physics/vb-to-mathbf](https://texform.dev/rules/physics/vb-to-mathbf): Canonicalize vb to an explicit mathbf wrapper.
- [physics/vu-to-hat-mathbf](https://texform.dev/rules/physics/vu-to-hat-mathbf): Canonicalize vu to an explicit hat-wrapped mathbf form.

## Notes

Star is preserved on the short alias because physics VectorBold uses it for bold-italic styling and for lowercase Greek handling.

## Disable this rule

```python
TransformEngine(profile="corpus", disable_rules=["physics/vectorbold-to-vb"])
```

```javascript
new TransformEngine({ profile: 'corpus', disableRules: ['physics/vectorbold-to-vb'] })
```

[Open in Playground](https://play.texform.dev/?input=%5Cvectorbold%7BF%7D%3Dm%5Cvb%7Ba%7D)