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    • 6. 发明授权
    • Locking mechanism for live mathematical documents
    • 现场数学文件的锁定机制
    • US5844555A
    • 1998-12-01
    • US667187
    • 1996-06-20
    • Samuel MenakerMichael Stout
    • Samuel MenakerMichael Stout
    • G06F17/10G06F15/00
    • G06F17/10
    • A method and system for locking a defined portion of the live mathematical document. A live mathematical document program, executed on a computer processor, allows a user to edit a live mathematical document and also processes the document. The user can enter mathematical expressions in any position in the live mathematical document. The program automatically updates the live mathematical document to ensure that all expressions are consistent with all expressions upon which they depend. The user can position a first boundary line and a second boundary line in the live mathematical document. The program locks an area on the live mathematical document, the locked area being the area between the first boundary line and the second boundary line. An editor allows editing of expressions in the live mathematical document, and ascertains whether an edit is within the locked area and disallows such edits. Expressions, including expressions in the locked area, are automatically updated by the live mathematical document program to ensure that all expressions in the live mathematical document are consistent with all expressions upon which they depend.
    • 一种用于锁定活动数学文件的定义部分的方法和系统。 在计算机处理器上执行的实时数学文档程序允许用户编辑实况数学文档并处理该文档。 用户可以在实时数学文档中的任何位置输入数学表达式。 程序会自动更新实时数学文档,以确保所有表达式与所依赖的所有表达式一致。 用户可以在实时数学文件中定位第一边界线和第二边界线。 该程序锁定活动数学文件上的区域,锁定区域是第一边界线和第二边界线之间的区域。 编辑器允许在现场数学文档中编辑表达式,并确定编辑是否在锁定区域内,并且不允许进行此类编辑。 表达式,包括锁定区域中的表达式,由实时数学文档程序自动更新,以确保活动数学文档中的所有表达式与所依赖的所有表达式一致。