Source: wikibot/blackboard-bold
= Blackboard bold
{wiki=Blackboard_bold}
Blackboard bold, also known as double-struck or gothic bold, is a typeface style used primarily in mathematics and physics notation. It is characterized by the use of boldface letters that resemble standard characters but have a more stylized appearance, often involving a double line effect. In typesetting, it is commonly used to represent certain sets or specific mathematical objects.