Squashed commit of the following:

commit 3ba6686fc991998a0a420709dfb0012bbddf77ab
Author: Cliff Click <cliffc@acm.org>
Date:   Tue Sep 29 12:21:46 2026 -0700

    Backport lazy memory splits to ch10, split into ch10a and b

commit fa7d56f72455828826d0ab7e1c142ca814e6e2aa
Author: Cliff Click <cliffc@acm.org>
Date:   Tue Sep 29 10:10:53 2026 -0700

    Reverse edges

commit e1bba17ff54400a34ede0eaacad863420d021119
Author: Cliff Click <cliffc@acm.org>
Date:   Tue Sep 29 09:44:41 2026 -0700

    Split ch10

    Basic memory introduction in 10a, then precise aliases in 10b.

1 files changed, 0 insertions, 105 deletions

diff --git a/chapter10/Makefile b/chapter10/Makefile
deleted file mode 100644
index 77df7182..00000000
--- a/chapter10/Makefile
+++ /dev/null
@@ -1,105 +0,0 @@
-SHELL := /bin/bash
-# Shared packaging target; included after chapter source variables below.
-.DELETE_ON_ERROR:
-
-# for printing variable values
-# usage: make print-VARIABLE
-#        > VARIABLE = value_of_variable
-print-%  : ; @echo $* = $($*)
-
-# literal space
-space := $() $()
-
-# Decide OS-specific questions
-# jar-file seperator
-ifeq ($(OS),Windows_NT)
-	SEP = ;
-else
-	SEP = :
-endif
-# Find a reasonable ctags.
-CTAGS = $(shell which ctags)
-# Hack for MacOS: /usr/bin/ctags is unfriendly, so look for ctags from brew
-ifeq ($(UNAME),Darwin)
-	CTAGS = $(shell brew list ctags 2> /dev/null | grep bin/ctags)
-endif
-
-# Fun Args to javac.  Mostly limit to java8 source definitions, and fairly
-# aggressive lint warnings.
-JAVAC_ARGS = -g
-
-# Source code
-SIMPLE := com/seaofnodes/simple
-SRC := src/main/java
-TST := src/test/java
-CLZDIR:= build/classes
-main_javas   := $(wildcard $(SRC)/$(SIMPLE)/*java $(SRC)/$(SIMPLE)/*/*java)
-test_javas   := $(wildcard $(TST)/$(SIMPLE)/*java $(TST)/$(SIMPLE)/*/*java)
-main_classes := $(patsubst $(SRC)/%java,$(CLZDIR)/main/%class,$(main_javas))
-include $(firstword $(wildcard ../graph/graph.mk graph/graph.mk))
-test_classes := $(patsubst $(TST)/%java,$(CLZDIR)/test/%class,$(test_javas))
-test_cp      := $(patsubst $(TST)/$(SIMPLE)/%.java,com.seaofnodes.simple.%,$(wildcard $(TST)/$(SIMPLE)/*Test.java))
-classes = $(main_classes) $(test_classes)
-# All the libraries
-libs = $(wildcard lib/*jar)
-jars = $(subst $(space),$(SEP),$(libs))
-
-
-default_targets := $(main_classes) $(test_classes)
-# Optionally add ctags to the default target if a reasonable one was found.
-ifneq ($(CTAGS),)
-default_targets += tags
-endif
-
-default: $(default_targets)
-
-# Compile just the out-of-date files
-$(main_classes): build/classes/main/%class: $(SRC)/%java $(graph_javas)
-	@echo "compiling " $@ " because " $?
-	@[ -d $(CLZDIR)/main ] || mkdir -p $(CLZDIR)/main
-	@javac $(JAVAC_ARGS) -cp "$(CLZDIR)/main$(SEP)$(jars)" -sourcepath $(SRC) -d $(CLZDIR)/main $(main_javas)
-
-$(test_classes): $(CLZDIR)/test/%class: $(TST)/%java $(main_classes)
-	@echo "compiling " $@ " because " $?
-	@[ -d $(CLZDIR)/test ] || mkdir -p $(CLZDIR)/test
-	@javac $(JAVAC_ARGS) -cp "$(CLZDIR)/test$(SEP)$(CLZDIR)/main$(SEP)$(jars)" -sourcepath $(TST) -d $(CLZDIR)/test $(test_javas)
-
-# Base launch line for JVM tests
-JVM=nice java -ea -cp "build/classes/main${SEP}${jars}${SEP}$(CLZDIR)/test"
-
-tests:	$(default_targets)
-	@echo "testing " $(test_cp)
-	@$(JVM) org.junit.runner.JUnitCore $(test_cp) com.seaofnodes.simple.FuzzerWrap
-
-fuzzer: $(default_targets)
-	@echo "fuzzing " $(test_cp)
-	@$(JVM) org.junit.runner.JUnitCore com.seaofnodes.simple.FuzzerWrap
-
-
-.PHONY: clean
-clean:
-	rm -rf build
-	rm -f TAGS
-	(find . -name "*~" -exec rm {} \; 2>/dev/null; exit 0)
-
-# Download libs from maven
-lib:	lib/junit-4.12.jar  lib/hamcrest-core-1.3.jar
-
-# Jars
-lib/junit-4.12.jar:
-	@[ -d lib ] || mkdir -p lib
-	@(cd lib; wget https://repo1.maven.org/maven2/junit/junit/4.12/junit-4.12.jar)
-
-lib/hamcrest-core-1.3.jar:
-	@[ -d lib ] || mkdir -p lib
-	@(cd lib; wget https://repo1.maven.org/maven2/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar)
-
-# Build emacs tags (part of a tasty emacs ide experience)
-tags:	$(main_javas) $(test_javas)
-	@rm -f TAGS
-	@$(CTAGS) -e --recurse=yes --extra=+q --fields=+fksaiS $(SRC) $(TST)
-
-include $(firstword $(wildcard ../build-support/chapter-release.mk build-support/chapter-release.mk))
-
-.PHONY: build
-build: $(main_classes)