关于在导子下闭的替换：例子
On substitutions closed under derivation: examples
摘要：
我们研究由态射固定的无限词及其派生词。派生字是返回到因子的字的编码。我们展示了两个例子的集合态射是封闭的下导-任何派生词关于任何因素的不动点再次固定的态射从这个集合。第一个例子涉及标准的episturmian态射，第二个例子涉及倍周期态射。
英文摘要：
We study infinite words fixed by a morphism and their derived words. A derived word is a coding of return words to a factor. We exhibit two examples of sets of morphisms which are closed under derivation --- any derived word with respect to any factor of the fixed point is again fixed by a morphism from this set. The first example involves standard episturmian morphisms, and the second concerns the period doubling morphism.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
